Understanding Customer Lockbox
On occasion, you may need to contact Microsoft for support in relation to your Office 365 tenant. This is usually achieved via the use of troubleshooting tools or other means.
However, on some occasions, it may be necessary for a Microsoft Engineer to request access to your tenant.
In order to ensure that this is carried out in a secure and controlled manner, Microsoft provide the Customer Lockbox feature, which, when enabled, will require any Microsoft support representatives to complete a request and approval process in order to gain access.
Important note
Customer Lockbox is only available for organizations with Microsoft 365 E5, Office 365 E5, Information Protection and Compliance, or Advanced Compliance add-on subscriptions. Customer Lockbox currently works only with Exchange Online, OneDrive, and SharePoint Online.
Enabling Customer Lockbox
The Customer Lockbox feature can be enabled in the Microsoft 365 Admin Center by Office...