While creating a Microsoft 365 user, I get the following error "Invalid syntax Parameter Name."

Possible Cause:

This behavior occurs because certain special characters aren't permitted in user names that you create in the Office 365. These special characters include but aren't limited to the following:

Property	UserPrincipalName requirements
Characters allowed	A – Z a - z 0 – 9 ' . - _ ! # ^ ~
Characters not allowed	Any "@" character that's not separating the username from the domain. Can't contain a period character "." immediately preceding the "@" symbol Can't contain an ampersand (&) character in the user name.
Length constraints	The total length must not exceed 113 characters There can be up to 64 characters before the "@" symbol There can be up to 48 characters after the "@" symbol

Solution:

This message is displayed when there is an error in the value being assigned to the parameter. There might be spaces or special characters in the values. Ensure that the parameter is not empty and does not contain any spaces or special characters.

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