SyncWindowSetting following an Exchange Online migration

  • Thread starter Thread starter Simone -
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Simone -

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Hello,

following an Exchange Online migration we configured a GPO to limit Outlook cached mode to 3 months "Cached Exchange Mode Sync Settings"; at this point, we would like to lift the restriction without having remote sites exhausting their bandwidth.

I assumed Outlook was going to use the SyncWindowSetting (with a one time GPP) under "HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\Cached Mode" and leave users free to use the slider again, but apparently the setting is stored somewhere else. As soon as we remove the GPO the slider goes up to "all" (if configured before the migration) or "12 months" as described in the GPO setting: "If you disable or do not configure this policy setting, Outlook synchronizes the last 12 months of email messages to users' computers".

We have a case open but it's taking a long time; any hints/ideas?

Thanks,

Simone

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