diff --git a/Sources/Screens/File/FileToolbar.swift b/Sources/Screens/File/FileToolbar.swift
index 5525172..07186c0 100644
--- a/Sources/Screens/File/FileToolbar.swift
+++ b/Sources/Screens/File/FileToolbar.swift
@@ -37,8 +37,10 @@ struct FileToolbar: ViewModifier {
                 ToolbarItem(placement: .topBarTrailing) {
                     tasksButton
                 }
-                ToolbarItem(placement: .topBarLeading) {
-                    uploadMenu
+                if let file = fileStore.file, file.permission.ge(.editor) {
+                    ToolbarItem(placement: .topBarLeading) {
+                        uploadMenu
+                    }
                 }
                 ToolbarItem(placement: .topBarLeading) {
                     if fileStore.entitiesIsLoading {
diff --git a/Sources/Screens/Group/GroupMemberList.swift b/Sources/Screens/Group/GroupMemberList.swift
index e5443de..94640ff 100644
--- a/Sources/Screens/Group/GroupMemberList.swift
+++ b/Sources/Screens/Group/GroupMemberList.swift
@@ -65,11 +65,13 @@ struct GroupMemberList: View, ViewDataProvider, LoadStateProvider, TimerLifecycl
         .navigationBarTitleDisplayMode(.inline)
         .navigationTitle("Members")
         .toolbar {
-            ToolbarItem(placement: .topBarLeading) {
-                Button {
-                    addMemberIsPresentable = true
-                } label: {
-                    Image(systemName: "plus")
+            if let group = groupStore.current, group.permission.ge(.owner) {
+                ToolbarItem(placement: .topBarLeading) {
+                    Button {
+                        addMemberIsPresentable = true
+                    } label: {
+                        Image(systemName: "plus")
+                    }
                 }
             }
         }
diff --git a/Sources/Screens/Group/GroupOverview.swift b/Sources/Screens/Group/GroupOverview.swift
index 803dbae..72ce96a 100644
--- a/Sources/Screens/Group/GroupOverview.swift
+++ b/Sources/Screens/Group/GroupOverview.swift
@@ -24,23 +24,21 @@ struct GroupOverview: View {
 
     var body: some View {
         VStack {
-            if let current = groupStore.current {
-                VStack {
-                    VOAvatar(name: current.name, size: 100)
-                        .padding()
-                    Form {
-                        NavigationLink {
-                            GroupMemberList(groupStore: groupStore)
-                        } label: {
-                            Label("Members", systemImage: "person.2")
-                        }
-                        NavigationLink {
-                            GroupSettings(groupStore: groupStore) {
-                                dismiss()
-                            }
-                        } label: {
-                            Label("Settings", systemImage: "gear")
+            VStack {
+                VOAvatar(name: group.name, size: 100)
+                    .padding()
+                Form {
+                    NavigationLink {
+                        GroupMemberList(groupStore: groupStore)
+                    } label: {
+                        Label("Members", systemImage: "person.2")
+                    }
+                    NavigationLink {
+                        GroupSettings(groupStore: groupStore) {
+                            dismiss()
                         }
+                    } label: {
+                        Label("Settings", systemImage: "gear")
                     }
                 }
             }
diff --git a/Sources/Screens/Group/GroupSettings.swift b/Sources/Screens/Group/GroupSettings.swift
index 3bb33f6..ad20fa6 100644
--- a/Sources/Screens/Group/GroupSettings.swift
+++ b/Sources/Screens/Group/GroupSettings.swift
@@ -26,7 +26,7 @@ struct GroupSettings: View, ErrorPresentable {
 
     var body: some View {
         Group {
-            if let group = groupStore.current {
+            if let current = groupStore.current {
                 Form {
                     Section(header: VOSectionHeader("Basics")) {
                         NavigationLink {
@@ -40,27 +40,29 @@ struct GroupSettings: View, ErrorPresentable {
                             HStack {
                                 Text("Name")
                                 Spacer()
-                                Text(group.name)
+                                Text(current.name)
                                     .lineLimit(1)
                                     .truncationMode(.tail)
                                     .foregroundStyle(.secondary)
                             }
                         }
-                        .disabled(isDeleting)
+                        .disabled(isDeleting || current.permission.lt(.editor))
                     }
-                    Section(header: VOSectionHeader("Advanced")) {
-                        Button(role: .destructive) {
-                            deleteConfirmationIsPresented = true
-                        } label: {
-                            VOFormButtonLabel("Delete Group", isLoading: isDeleting)
-                        }
-                        .disabled(isDeleting)
-                        .confirmationDialog("Delete Group", isPresented: $deleteConfirmationIsPresented) {
-                            Button("Delete Permanently", role: .destructive) {
-                                performDelete()
+                    if current.permission.ge(.owner) {
+                        Section(header: VOSectionHeader("Advanced")) {
+                            Button(role: .destructive) {
+                                deleteConfirmationIsPresented = true
+                            } label: {
+                                VOFormButtonLabel("Delete Group", isLoading: isDeleting)
+                            }
+                            .disabled(isDeleting)
+                            .confirmationDialog("Delete Group", isPresented: $deleteConfirmationIsPresented) {
+                                Button("Delete Permanently", role: .destructive) {
+                                    performDelete()
+                                }
+                            } message: {
+                                Text("Are you sure you want to delete this group?")
                             }
-                        } message: {
-                            Text("Are you sure you want to delete this group?")
                         }
                     }
                 }
diff --git a/Sources/Screens/Invitation/InvitationStore.swift b/Sources/Screens/Invitation/InvitationStore.swift
index 6914f8e..941c17e 100644
--- a/Sources/Screens/Invitation/InvitationStore.swift
+++ b/Sources/Screens/Invitation/InvitationStore.swift
@@ -48,9 +48,11 @@ class InvitationStore: ObservableObject {
 
     private func fetchList(page: Int = 1, size: Int = Constants.pageSize) async throws -> VOInvitation.List? {
         if let organizationID {
-            try await invitationClient?.fetchOutgoingList(.init(organizationID: organizationID, page: page, size: size))
+            try await invitationClient?.fetchOutgoingList(
+                .init(organizationID: organizationID, page: page, size: size, sortBy: .dateCreated, sortOrder: .desc))
         } else {
-            try await invitationClient?.fetchIncomingList(.init(page: page, size: size))
+            try await invitationClient?.fetchIncomingList(
+                .init(page: page, size: size, sortBy: .dateCreated, sortOrder: .desc))
         }
     }
 
diff --git a/Sources/Screens/Organization/OrganizationOverview.swift b/Sources/Screens/Organization/OrganizationOverview.swift
index 7fa7a29..2bdcc09 100644
--- a/Sources/Screens/Organization/OrganizationOverview.swift
+++ b/Sources/Screens/Organization/OrganizationOverview.swift
@@ -24,28 +24,28 @@ struct OrganizationOverview: View {
 
     var body: some View {
         VStack {
-            if let current = organizationStore.current {
-                VStack {
-                    VOAvatar(name: current.name, size: 100)
-                        .padding()
-                    Form {
-                        NavigationLink {
-                            OrganizationMemberList(organizationStore: organizationStore)
-                        } label: {
-                            Label("Members", systemImage: "person.2")
-                        }
+            VStack {
+                VOAvatar(name: organization.name, size: 100)
+                    .padding()
+                Form {
+                    NavigationLink {
+                        OrganizationMemberList(organizationStore: organizationStore)
+                    } label: {
+                        Label("Members", systemImage: "person.2")
+                    }
+                    if organization.permission.ge(.owner) {
                         NavigationLink {
                             InvitationOutgoingList(organization.id)
                         } label: {
                             Label("Invitations", systemImage: "paperplane")
                         }
-                        NavigationLink {
-                            OrganizationSettings(organizationStore: organizationStore) {
-                                dismiss()
-                            }
-                        } label: {
-                            Label("Settings", systemImage: "gear")
+                    }
+                    NavigationLink {
+                        OrganizationSettings(organizationStore: organizationStore) {
+                            dismiss()
                         }
+                    } label: {
+                        Label("Settings", systemImage: "gear")
                     }
                 }
             }
diff --git a/Sources/Screens/Organization/OrganizationSettings.swift b/Sources/Screens/Organization/OrganizationSettings.swift
index 86fce84..48b338d 100644
--- a/Sources/Screens/Organization/OrganizationSettings.swift
+++ b/Sources/Screens/Organization/OrganizationSettings.swift
@@ -15,7 +15,9 @@ struct OrganizationSettings: View, ErrorPresentable {
     @EnvironmentObject private var tokenStore: TokenStore
     @ObservedObject private var organizationStore: OrganizationStore
     @Environment(\.dismiss) private var dismiss
+    @State private var leaveConfirmationIsPresented = false
     @State private var deleteConfirmationIsPresented = false
+    @State private var isLeaving = false
     @State private var isDeleting = false
     private var onCompletion: (() -> Void)?
 
@@ -26,7 +28,7 @@ struct OrganizationSettings: View, ErrorPresentable {
 
     var body: some View {
         Group {
-            if let organization = organizationStore.current {
+            if let current = organizationStore.current {
                 Form {
                     Section(header: VOSectionHeader("Basics")) {
                         NavigationLink {
@@ -42,27 +44,44 @@ struct OrganizationSettings: View, ErrorPresentable {
                             HStack {
                                 Text("Name")
                                 Spacer()
-                                Text(organization.name)
+                                Text(current.name)
                                     .lineLimit(1)
                                     .truncationMode(.tail)
                                     .foregroundStyle(.secondary)
                             }
                         }
-                        .disabled(isDeleting)
+                        .disabled(isDeleting || current.permission.lt(.editor))
                     }
-                    Section(header: VOSectionHeader("Advanced")) {
+                    Section(header: VOSectionHeader("Membership")) {
                         Button(role: .destructive) {
-                            deleteConfirmationIsPresented = true
+                            leaveConfirmationIsPresented = true
                         } label: {
-                            VOFormButtonLabel("Delete Organization", isLoading: isDeleting)
+                            VOFormButtonLabel("Leave Organization", isLoading: isLeaving)
                         }
-                        .disabled(isDeleting)
-                        .confirmationDialog("Delete Organization", isPresented: $deleteConfirmationIsPresented) {
-                            Button("Delete Permanently", role: .destructive) {
-                                performDelete()
+                        .disabled(isLeaving)
+                        .confirmationDialog("Leave Organization", isPresented: $leaveConfirmationIsPresented) {
+                            Button("Leave", role: .destructive) {
+                                performLeave()
                             }
                         } message: {
-                            Text("Are you sure you want to delete this organization?")
+                            Text("Are you sure you want to leave this organization?")
+                        }
+                    }
+                    if current.permission.ge(.owner) {
+                        Section(header: VOSectionHeader("Advanced")) {
+                            Button(role: .destructive) {
+                                deleteConfirmationIsPresented = true
+                            } label: {
+                                VOFormButtonLabel("Delete Organization", isLoading: isDeleting)
+                            }
+                            .disabled(isDeleting)
+                            .confirmationDialog("Delete Organization", isPresented: $deleteConfirmationIsPresented) {
+                                Button("Delete Permanently", role: .destructive) {
+                                    performDelete()
+                                }
+                            } message: {
+                                Text("Are you sure you want to delete this organization?")
+                            }
                         }
                     }
                 }
@@ -73,8 +92,27 @@ struct OrganizationSettings: View, ErrorPresentable {
         .voErrorSheet(isPresented: $errorIsPresented, message: errorMessage)
     }
 
+    private func performLeave() {
+        withErrorHandling {
+            try await organizationStore.leave()
+            return true
+        } before: {
+            isLeaving = true
+        } success: {
+            dismiss()
+            if let current = organizationStore.current {
+                reflectLeaveInStore(current.id)
+            }
+            onCompletion?()
+        } failure: { message in
+            errorMessage = message
+            errorIsPresented = true
+        } anyways: {
+            isLeaving = false
+        }
+    }
+
     private func performDelete() {
-        let current = organizationStore.current
         withErrorHandling {
             try await organizationStore.delete()
             return true
@@ -82,7 +120,7 @@ struct OrganizationSettings: View, ErrorPresentable {
             isDeleting = true
         } success: {
             dismiss()
-            if let current {
+            if let current = organizationStore.current {
                 reflectDeleteInStore(current.id)
             }
             onCompletion?()
@@ -94,6 +132,10 @@ struct OrganizationSettings: View, ErrorPresentable {
         }
     }
 
+    private func reflectLeaveInStore(_ id: String) {
+        organizationStore.entities?.removeAll(where: { $0.id == id })
+    }
+
     private func reflectDeleteInStore(_ id: String) {
         organizationStore.entities?.removeAll(where: { $0.id == id })
     }
diff --git a/Sources/Screens/Organization/OrganizationStore.swift b/Sources/Screens/Organization/OrganizationStore.swift
index ff746d4..8835338 100644
--- a/Sources/Screens/Organization/OrganizationStore.swift
+++ b/Sources/Screens/Organization/OrganizationStore.swift
@@ -111,6 +111,11 @@ class OrganizationStore: ObservableObject {
         try await organizationClient?.patchName(id, options: .init(name: name))
     }
 
+    func leave() async throws {
+        guard let current else { return }
+        try await organizationClient?.leave(current.id)
+    }
+
     func delete() async throws {
         guard let current else { return }
         try await organizationClient?.delete(current.id)
diff --git a/Sources/Screens/Workspace/WorkspaceOverview.swift b/Sources/Screens/Workspace/WorkspaceOverview.swift
index ad0276e..30a811c 100644
--- a/Sources/Screens/Workspace/WorkspaceOverview.swift
+++ b/Sources/Screens/Workspace/WorkspaceOverview.swift
@@ -29,26 +29,24 @@ struct WorkspaceOverview: View, ViewDataProvider, LoadStateProvider {
             } else if let error {
                 VOErrorMessage(error)
             } else {
-                if let current = workspaceStore.current {
-                    VStack {
-                        VOAvatar(name: workspace.name, size: 100)
-                            .padding()
-                        Form {
-                            NavigationLink {
-                                if let root = workspaceStore.root {
-                                    FileOverview(root, workspaceStore: workspaceStore)
-                                        .navigationTitle(current.name)
-                                }
-                            } label: {
-                                Label("Files", systemImage: "folder")
+                VStack {
+                    VOAvatar(name: workspace.name, size: 100)
+                        .padding()
+                    Form {
+                        NavigationLink {
+                            if let root = workspaceStore.root {
+                                FileOverview(root, workspaceStore: workspaceStore)
+                                    .navigationTitle(workspace.name)
                             }
-                            NavigationLink {
-                                WorkspaceSettings(workspaceStore: workspaceStore) {
-                                    dismiss()
-                                }
-                            } label: {
-                                Label("Settings", systemImage: "gear")
+                        } label: {
+                            Label("Files", systemImage: "folder")
+                        }
+                        NavigationLink {
+                            WorkspaceSettings(workspaceStore: workspaceStore) {
+                                dismiss()
                             }
+                        } label: {
+                            Label("Settings", systemImage: "gear")
                         }
                     }
                 }
diff --git a/Sources/Screens/Workspace/WorkspaceSettings.swift b/Sources/Screens/Workspace/WorkspaceSettings.swift
index af04ad9..b20882e 100644
--- a/Sources/Screens/Workspace/WorkspaceSettings.swift
+++ b/Sources/Screens/Workspace/WorkspaceSettings.swift
@@ -53,7 +53,7 @@ struct WorkspaceSettings: View, ViewDataProvider, LoadStateProvider, ErrorPresen
                                         .foregroundStyle(.secondary)
                                 }
                             }
-                            .disabled(isDeleting)
+                            .disabled(isDeleting || current.permission.lt(.owner))
                         }
                         Section(header: VOSectionHeader("Basics")) {
                             NavigationLink {
@@ -75,21 +75,23 @@ struct WorkspaceSettings: View, ViewDataProvider, LoadStateProvider, ErrorPresen
                                         .foregroundStyle(.secondary)
                                 }
                             }
-                            .disabled(isDeleting)
+                            .disabled(isDeleting || current.permission.lt(.editor))
                         }
-                        Section(header: VOSectionHeader("Advanced")) {
-                            Button(role: .destructive) {
-                                deleteConfirmationIsPresentable = true
-                            } label: {
-                                VOFormButtonLabel("Delete Workspace", isLoading: isDeleting)
-                            }
-                            .disabled(isDeleting)
-                            .confirmationDialog("Delete Workspace", isPresented: $deleteConfirmationIsPresentable) {
-                                Button("Delete Permanently", role: .destructive) {
-                                    performDelete()
+                        if current.permission.ge(.owner) {
+                            Section(header: VOSectionHeader("Advanced")) {
+                                Button(role: .destructive) {
+                                    deleteConfirmationIsPresentable = true
+                                } label: {
+                                    VOFormButtonLabel("Delete Workspace", isLoading: isDeleting)
+                                }
+                                .disabled(isDeleting)
+                                .confirmationDialog("Delete Workspace", isPresented: $deleteConfirmationIsPresentable) {
+                                    Button("Delete Permanently", role: .destructive) {
+                                        performDelete()
+                                    }
+                                } message: {
+                                    Text("Are you sure you want to delete this workspace?")
                                 }
-                            } message: {
-                                Text("Are you sure you want to delete this workspace?")
                             }
                         }
                     }
diff --git a/Voltaserve.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved b/Voltaserve.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved
index 39fe173..a9545ac 100644
--- a/Voltaserve.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved
+++ b/Voltaserve.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved
@@ -16,7 +16,7 @@
       "location" : "https://github.com/kouprlabs/voltaserve-swift.git",
       "state" : {
         "branch" : "main",
-        "revision" : "8e7eca9e8cdc04c42cff9cd05ac41f1bfd61f881"
+        "revision" : "c3e98454a3ee6a71f1d4021926f4623460027c55"
       }
     }
   ],