Hi,
After we copied our Dev instance to another Sandbox instance we got this message on opening CRM.

To disable it.
Go to Office 365 Administration Section
Select your sandbox instance.
Click on Admin 

Hope it helps.
Filed under: CRM 2013, CRM 2015, Microsoft Dynamics CRM Tagged: CRM 2011, CRM 2013, CRM 2015, Microsoft Dynamics CRM

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