Exchange Outlook Cache mode

Hello ER2025, 

You can achieve this with a script powershell deployed via Intune, you just need to change a registry key and this will set the cache mode to 3 months, here is the step to do it:

Here is the path and the key that needs to be modified or created if needed : 

Registry Key to Set Cached Mode to 3 Months

Path: HKCU\Software\Policies\Microsoft\Office\16.0\Outlook\Cached Mode

Key: SyncWindowSettingDays

Type: DWORD

Value: 90 (for 3 months)

Here is the Powershell script: 

New-Item -Path "HKCU:\Software\Policies\Microsoft\Office\16.0\Outlook\Cached Mode" -Force
Set-ItemProperty -Path "HKCU:\Software\Policies\Microsoft\Office\16.0\Outlook\Cached Mode" -Name "SyncWindowSettingDays" -Value 90 -Type DWord

Make sure first to test before deploying to everyone. 

Good luck,

Walid