Microsoft has fixed a known issue affecting Outlook for Microsoft 365 users since June and causing slow starts and freezes as if Offline Outlook Data Files (OST) were syncing right after launch.

Another solution is to display the specified REST status in Outlook account settings. This is done by toggling Shared Calendar Improvements off and on: To determine whether the performance problem is ...

Is your Outlook crashing when importing PST file? You are not the only one encountering this problem. This issue has been reported by many Outlook users. That’s why we have curated this guide. In this ...