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Is there a maximum length for userPrincipalName in Active Directory?

I am writing an application related to Active Directory and I need to save userPrincipalName in the database table, but I do not know how large the field should be.

No lengths are specified in MSDN , nor in RFC 822 . Now, before I get back to DOMAIN \ Username, which has a specific length ( sAMAccountName , less than 20 characters, NETBIOS domain name no more than 15 chars), I wonder if anyone knows which limit is either standard or an implementation like in Windows 2003 and Windows 2008 domains.

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2 answers

In Win2k3 SP2, the longest userPrincipleName that he allows me to create is 1013 characters.

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no. Cannot change character length in login in Active Directory.

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