A User Principal Name (UPN) is made up of two parts, the prefix (user account name) and the suffix (DNS domain name). For example:
user1@sampledomain.com
In the above example, prefix is user1 and suffix is sampledomain.com.
Types of UPN changes
You can change a UPN by changing the prefix, suffix, or both:
- Changing the prefix. In case, a person's name is changed, you would have to change their account name as well.
Example: user1@sampledomain.com could be changed to user2@sampledomain.com.
- Changing the suffix. For example, if a person changes their division, you might want to change their domain as well:
user1@sampledomain.com could be changed to user1@sampledomainaustralia.com.
OneDrive URL:
A user's OneDrive URL is based on their UPN:
https://sampledomain-my.sharepoint.com/personal/user1_sampledomain_com
where user1_sampledomain_com corresponds with user1@sampledomain.com.
In this case, if you change the prefix to user2 and the suffix to sampledomainaustralia, then the user's OneDrive URL would change to:
>https://sampledomain-my.sharepoint.com/personal/user2_sampledomainaustralia_com
After you change a UPN, any saved links to the user's OneDrive (such as desktop shortcuts or browser favorites) will no longer work and will need to be updated.
How M365 Manager Plus can help protect files in OneDrive for Business:
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