Methods to Resolve Outlook Cannot Connect to Server Error
Outlook, when configured with Exchange server profile in Cached Exchange Mode, creates an OST or Offline Folder file.
In this guide, we’ve mentioned the reasons behind the error and the solutions to fix the 'Outlook cannot connect to server' error. The error occurs when authentication between Outlook and Exchange server fails due to corrupt profile, damaged or inaccessible OST file, synchronization issues, etc.
Outlook may fail to connect to the Exchange server due to several reasons.