Click the “ Empty the cache” button on the bottom.Right click (Control + Click) the folder in the folder list on the left side panel of Outlook.your inbox only has yesterdays mail while the rules that send email to other folders are still recieving new mail, then you can try the to “Empty the Cache” which is to say you can re-sync that folder with the Exchange server by doing the following:

If however only one folder does not sync but the rest of them do, i.e.

Choose the Identity you want, normally “ Main Identity“.

It will go into the Microsoft Database Utility mode where you can rebuild the Identity (Database).

Press the Option (Alt) key while clicking on Outlook to open it.

Backup (or copy) your Office 2011 identities folder located in “~/Documents/Microsoft User Data/Office 2011 identities/”.

Kill all Microsoft Office applications processes (i.e.To do this you can follow these instructions from Microsoft:

The Database for the Outlook profile can get corrupted over time and may need to be rebuilt on Outlook 2011 on Mac.

How to rebuild outlook identity on mac