Tag Archives: microsoft Outlook ost is in use and cannot be accessed

[Solved] How to Fix “OST is in use and cannot be accesses” Error?

Outlook users are very much aware of the importance of the OST (Offline Storage Table) file. You can use it even if you are not online with the Exchange server but synchronization takes place with Server mailbox only when Exchange connectivity is there. Outlook users need to depend on OST… Read more »