Download and installed the MFCMAPI program.
After a user is migrated from O365 to On Prem, they are unable to open their mailbox in OWA. This also will impact setting up Outlook Mobile Notes.
A quick workaround for this is to open in OWA Light Version.
Error message is as follows:
Download the LATEST version of mfcmapi here: https://github.com/stephenegriffin/mfcmapi/releases
Give yourself permissions to the mailbox in question.
Ensure that Cached Exchange Mode is OFF in Outlook.
Step:1 Click on Tools
Step:2 Click on Options.
Step:3 Select checkbox Use the MDB_ONLINE flag when calling OpenMsgStore.
Step:4 Click Ok.
Step:5 Click on Session.
Step:6 Click on Logon.
Step:7 Select your outlook profile.
Step:8 Double click on your profile under the “Display Name”.
Step:9 A new window will appear.
Step:10 Select Actions from the new window which appeared.
Step:11 Click on open special folder under Actions and select Inbox
Step:12 A new window will appear. From new window you will be able to see Inbox dropdown.
Step:13 Click on Inbox and you will be able to see entries on right panel.
Step:14 Select the value which has Tag Value of “0x36460102“.
Step:15 Delete this Tag
Have the user (or yourself) test.