


Additional details can be found in the admin center under EX218604 and OL218603. As a workaround, users can utilize Outlook on the web or their mobile clients.

We’re investigating whether a recently deployed update could be the source of this issue. Meanwhile, users can access their mail through and Outlook mobile apps. The latest update could be the cause of this issue. Microsoft is aware of this 0xc0000005 error issue and currently investigating to find the cause. For many users around the world, Outlook for Windows client is crashing immediately after starting up.
