Change the main account id for Microsoft 365 Business Basic subscription

Manjunath Kamath 0 Reputation points
2026-07-31T08:15:18.5266667+00:00

I want to rename the Microsoft 365 Business Basic account from ******@kamathgroups.onmicrosoft.com to

******@outlook.com

Microsoft 365 and Office | Subscription, account, billing | For business | Other
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  1. Vincent Choy 11,245 Reputation points Volunteer Moderator
    2026-07-31T08:30:37.8+00:00

    Based on what I know, I do not think you are able to make that change.

    Outlook.com is the domain used by Microsoft's consumer email system.

    yyyyy.onmicrosoft.com is the administrative domain when you first setup a Microsoft365 business account.

    You should buy a personalized domain and use that instead (eg kamalthgroups.com)

    The commercial versions of Microsoft365 allows personalized domains (eg vc @ kamalthgroups.com) if you are able to get the domain, if not a variation of it. This is the preferred way for a business domain as you can add more people to the domain as the company grows. Eg devi @ kamalthgroups.com, trisha @ kamathgroups.com etc

    The outlook.com domain does not give you the flexibility.

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