How to Prevent Guests Cannot Upload to a Shared Folder

When you share a folder in SharePoint or OneDrive with external users, those guests sometimes cannot upload files. This happens even when they can view or download the folder contents. The problem usually comes from incorrect sharing permissions or missing edit rights on the folder. This article explains the exact settings that control guest upload … Read more

How to Troubleshoot Sharing Expiration Date Does Not Apply to Existing Links

You set a sharing expiration date in SharePoint, but existing sharing links still work past that date. This happens because expiration policies only affect newly created links, not links that were already sent. This article explains why existing links remain active and shows you how to revoke or replace them manually. Key Takeaways: Fixing Expiration … Read more

Sharing Expiration Date Does Not Apply to Existing Links: Root Cause and Fix

You set a sharing expiration date in the SharePoint admin center, but existing sharing links continue to work past that date. This happens because the expiration policy only applies to new links created after the policy is saved. This article explains why the policy does not retroactively affect existing links and provides the exact steps … Read more

Blocked Domains Still Appear in the Sharing Dialog: Admin Checklist

You blocked a domain in the SharePoint admin center, yet users still see that domain in the sharing dialog when they invite guests. The blocked domain list in SharePoint and OneDrive controls who can receive sharing invitations, but it does not filter the domain suggestions that appear in the people picker. This article explains why … Read more

Blocked Domains Still Appear in the Sharing Dialog: Root Cause and Fix

You have added a domain to the SharePoint blocked domains list, yet users can still type that domain in the sharing dialog and send invitations. The domain appears in the external sharing prompt as if the block never took effect. This problem occurs because SharePoint Online and OneDrive enforce the blocked domains list only at … Read more

SharePoint Blocked Domains Still Appear in the Sharing Dialog: What Site Owners Should Check

You added a domain to the SharePoint blocked list, but that domain still shows up when you or your users try to share files and sites. This problem typically occurs because SharePoint enforces domain blocking at the tenant level, but the sharing dialog caches domain suggestions from the global address list and recent contacts. Site … Read more

Guest Invitation Email Never Arrives: Root Cause and Fix

When you invite an external guest to a SharePoint site or Microsoft 365 group, the invitation email should arrive within minutes. Many administrators and site owners report that the guest invitation email never arrives at the recipient’s inbox. This problem is almost always caused by a combination of tenant-level sharing restrictions, Exchange Online transport rules, … Read more

Sharing Report Shows Unknown Users: Fix

When you run a SharePoint sharing report, you might see entries labeled as “Unknown User” instead of a person’s name or email address. This problem occurs because the sharing report cannot resolve the identity of a user who accepted an external sharing invitation but is not yet synchronized into your Microsoft 365 directory. This article … Read more