You have full access to a shared mailbox in Outlook, but when you try to search for emails inside it, the search returns no results. This problem occurs because Outlook by default does not download shared mailbox items to your local cache, so the Windows Search index cannot scan them. This article explains the root … Read more
You granted a delegate access to your Outlook calendar, but they report that private appointments and meetings are hidden or blocked. This happens even though the delegate has Editor or Author permissions on the folder. The cause is a single permission setting that controls whether delegates can view items you mark as private. This article … Read more
When you send a meeting invitation in Outlook, the tracking feature should show who accepted, tentatively accepted, or declined. If the tracking tab shows no responses or incorrect counts, you cannot manage attendance effectively. This problem usually occurs because of a corrupted calendar item, a conflict with delegate permissions, or a mismatch between the organizer’s … Read more
When a room mailbox in Exchange Online or on-premises stops automatically accepting meeting requests, users see pending or declined bookings despite the room being available. The auto-accept feature relies on a background process called the Calendar Attendant or a resource booking assistant that processes incoming requests. This article explains the most common causes for the … Read more
You click the Archive button in Outlook expecting a message to move to your default archive folder, but it lands in a different folder or disappears entirely. This problem occurs because Outlook uses a default archive location tied to the current mailbox or a manually set policy, and the button can behave differently depending on … Read more
You edit your email signature in Outlook, save it, and close the program. When you restart Outlook, the signature reverts to the old version. This problem happens because Outlook stores signatures in a local folder on your computer, and the changes you made are overwritten by a cached copy or by a sync issue with … Read more
After migrating your Outlook mailbox to a new server, Exchange environment, or Microsoft 365 tenant, you may notice that your inbox rules execute twice for every incoming message. Each rule applies its action — moving, copying, flagging, or forwarding a message — two times instead of once. This duplication typically occurs because two rule collections … Read more
After a user is renamed in Microsoft 365 or their display name is changed in Exchange Online, Outlook in Cached Exchange Mode may continue to show the old mailbox name in the folder pane. This happens even after restarting Outlook or waiting for the offline address book to update. The root cause is a locally … Read more
You started a mailbox repair or OST file rebuild in Outlook, but it freezes at the phrase “Updating Inbox” for hours. This leaves your email inaccessible and your calendar blank. The problem occurs when the local OST file is corrupted or when Windows Search tries to index a damaged item during the rebuild. This article … Read more
After a Windows or Outlook update, you may find that double-clicking a PDF attachment in Outlook opens a blank preview pane or shows the error “This file cannot be previewed.” This happens because the update resets or disables the PDF preview handler that Outlook relies on to render attachments in the Reading Pane and the … Read more