Address：A1-2nd and A2-4th floor of factory building, No.87 of Hengping Road , Baoan Community, Yuanshan Street, Longgang District, Shenzhen, China

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Did you need any more help with this question? If not, could you please mark "Accept Answer" on the appropriate answer so other users can reference it?And, if you have any further questions do let us know.

Thanks for your reply! Please kindly understand that the Outlook tag here we mainly focus on general issues about Outlook desktop client. In order to better solve your problem, it's suggested to post your issue to the appropriate tag for more professional help. Microsoft Intune - Microsoft Q&A , Office Development - Microsoft Q&A

According to your description, this is not supported in Outlook at the moment. Please kindly understand that many functions are not designed at present. To get this feature more quickly, I have found a post in feedback collection website, and you could vote for it.

Shenzhen Changke Connect is a professional manufacturer of medical cables, cable assemblies that can be customized to your specifications. Our products have been approved CE, CFDA, FDA, UL etc..

Yes I need more help because your answer did not give any help. Maybe it's not supported in Outlook at the moment but maybe it's supported to do a workaround with GPO or Intune or other services.

We are using Microsoft 365 and Microsoft 365 E3 licenses in our company. We want to limit our users' Outlook access to only their corporate email accounts of our corporate domains. They mustn't be able to add any other accounts, whether personal or work, they must only be able to add their mail accounts of our corporate domains. Is it possible ? How ?

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

All the registered trademarks, brand names, models and so on shown in the above contents are owned by the original owner or the original manufacturer. This article is only for illustrating the compatibility of  Changke Connect products. It has no other intention! All the above information is for reference only. Do not use it as a guide for medical institutions or related units. Otherwise, any consequences will not be related to our company.

Many features of our current products are designed and upgraded based on customers’ feedback. You can also make suggestions on that website and hope Microsoft will notice this in the future. Thank you for your understanding and support.