Outlook mailbox name not updating
If you are making use of shared calendars in Outlook 2016 you may find that not all appointments are showing in the calendar or are disappearing.
Typically this happens when running Outlook 2016 in cached mode with exchange or Office 365.
Auto Archive and Archive are options in Outlook to automatically or manually initiate moving of Outlook items to an Outlook Data File (pst-files) based on preconfigured settings.
You can set default Auto Archive settings but also overrule them on a per-folder level or via a manual Archive.
If you are not sure that you are using hosted exchange please do not follow these steps as incorrectly deleting the Outlook data file may delete your Outlook email permanently.
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The problem arises when the offline items do not match with the online items, due to any sort of connectivity issues.
How can we configure Exchange or Outlook so it automatically updates the server name? That didn't fix the original problem, although it did resolve a secondary issue (Outlook prompting for credentials and unable to access public folders on Exchange 2010 after the mailbox had been moved to Exchange 2013).
Outlook 2010 and later clients still don't automatically update the server name.
Solution 3– To deal with the problem, you can start with clearing the Offline items from Outlook.
As you know that you can use Outlook offline anytime with the help of the cached data it has stored.