The default file size limit for Outlook data file (.ost) is 50GB. To change file size limit to 100 GB, add following keys to the registry usind cmd or regedit.
REG ADD HKCU\Software\Microsoft\Office\16.0\Outlook\PST /v WarnLargeFileSize /t REG_DWORD /d 102400 /f
REG ADD HKCU\Software\Microsoft\Office\16.0\Outlook\PST /v MaxLargeFileSize /t REG_DWORD /d 107520 /f
When migratign to Outlook 365, it can happen that the default folders are created in a different language than you would like to have (probably english). To change this, every folder that might already exist in the target language, but are not default folders, must be deleted first. After you have to run the following commands. Outlook will then translate all default folders to you system language.
outlook.exe /resestfolders
outlook.exe /resetfoldernames
Outlook has some really weird search behaviour. It is best to change a few settings for shared mailboxes. Otherwise mails cannot be found reliably.
- Deactivate download shared mailboxes, use online mode
- Select "Current Mailbox" in search settings
- Disable "Limit email results in search"
An alternative is to disable auto mapping and add a shared mailbox as an exchange account instead. There all search options are available.