diff --git a/changelogs/fragments/10908.yml b/changelogs/fragments/10908.yml
new file mode 100644
index 000000000000..fdc653eb284b
--- /dev/null
+++ b/changelogs/fragments/10908.yml
@@ -0,0 +1,2 @@
+fix:
+- Trim collaboratorId when adding collaborators for workspace ([#10908](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/10908))
diff --git a/src/plugins/workspace/public/components/workspace_form/add_collaborator_button.test.tsx b/src/plugins/workspace/public/components/workspace_form/add_collaborator_button.test.tsx
index 82d4bae43c66..417dda986761 100644
--- a/src/plugins/workspace/public/components/workspace_form/add_collaborator_button.test.tsx
+++ b/src/plugins/workspace/public/components/workspace_form/add_collaborator_button.test.tsx
@@ -108,6 +108,45 @@ describe('AddCollaboratorButton', () => {
     ]);
   });
 
+  it('should trim collaborator IDs when adding collaborators', () => {
+    const mockOnAdd = jest.fn().mockImplementation(({ onAddCollaborators }) => {
+      onAddCollaborators([
+        {
+          accessLevel: 'readOnly',
+          collaboratorId: '  user-with-spaces  ',
+          permissionType: 'user',
+        },
+        {
+          accessLevel: 'admin',
+          collaboratorId: '\tgroup-with-tabs\t',
+          permissionType: 'group',
+        },
+      ]);
+    });
+    const displayedTypes = [
+      {
+        name: 'add user',
+        buttonLabel: 'add user',
+        onAdd: mockOnAdd,
+        id: 'user',
+      },
+    ];
+    const { getByTestId, getByText } = render(
+      <AddCollaboratorButton {...mockProps} displayedTypes={displayedTypes} />
+    );
+    const button = getByTestId('add-collaborator-button');
+    fireEvent.click(button);
+    const addUserButton = getByText('add user');
+    fireEvent.click(addUserButton);
+
+    expect(mockProps.handleSubmitPermissionSettings).toHaveBeenCalledWith([
+      { id: 0, modes: ['library_write', 'write'], type: 'user', userId: 'admin' },
+      { group: 'group', id: 1, modes: ['library_read', 'read'], type: 'group' },
+      { id: 2, modes: ['library_read', 'read'], type: 'user', userId: 'user-with-spaces' },
+      { id: 3, modes: ['library_write', 'write'], type: 'group', group: 'group-with-tabs' },
+    ]);
+  });
+
   it('should throw DuplicateCollaboratorError with consistent details', async () => {
     let errorCached: DuplicateCollaboratorError | undefined;
     const mockOnAdd = jest.fn(async ({ onAddCollaborators }) => {
diff --git a/src/plugins/workspace/public/components/workspace_form/add_collaborator_button.tsx b/src/plugins/workspace/public/components/workspace_form/add_collaborator_button.tsx
index ab4dab59af9f..59ff833cb834 100644
--- a/src/plugins/workspace/public/components/workspace_form/add_collaborator_button.tsx
+++ b/src/plugins/workspace/public/components/workspace_form/add_collaborator_button.tsx
@@ -56,19 +56,23 @@ export const AddCollaboratorButton = ({
 
   const onAddCollaborators = async (collaborators: WorkspaceCollaborator[]) => {
     const uniqueCollaboratorIds = new Set();
-    const addedSettings = collaborators.map(({ permissionType, accessLevel, collaboratorId }) => ({
-      type: permissionType,
-      modes: accessLevelNameToWorkspacePermissionModesMap[accessLevel],
-      id: nextIdGenerator(),
-      ...(permissionType === WorkspacePermissionItemType.User
-        ? {
-            userId: collaboratorId,
-          }
-        : {
-            group: collaboratorId,
-          }),
-      collaboratorId,
-    })) as Array<WorkspacePermissionSetting & { collaboratorId: string }>;
+    const addedSettings = collaborators.map(({ permissionType, accessLevel, collaboratorId }) => {
+      const trimmedId = collaboratorId.trim();
+      return {
+        type: permissionType,
+        modes: accessLevelNameToWorkspacePermissionModesMap[accessLevel],
+        id: nextIdGenerator(),
+        ...(permissionType === WorkspacePermissionItemType.User
+          ? {
+              userId: trimmedId,
+            }
+          : {
+              group: trimmedId,
+            }),
+        collaboratorId: trimmedId,
+      };
+    }) as Array<WorkspacePermissionSetting & { collaboratorId: string }>;
+
     const existingDuplicateSettings = addedSettings.filter((permissionSettingToAdd) =>
       hasSameUserIdOrGroup(permissionSettings, permissionSettingToAdd)
     );