DNS Reservation error: The Unique Identifier you have entered may not be correct. Do you want to use this Identifier anyway?

Posted on by Arun PC

This is more of an annoyance than an actual issue.

At the time of DNS reservation, I found this error when I am providing perfectly valid MAC address and IP address.

It turns out this is nothing but Windows telling you that it doesn’t like the colon (:) in the MAC address. Removing colons like below get things working perfectly.

 

Thanks,

Arun.P.C

Published by Arun PC

Father of two beautiful children, husband to a patient wife. Loves good a book, a pint of beer and good tech. Follow me https://twitter.com/arun_p_c

5 thoughts on “DNS Reservation error: The Unique Identifier you have entered may not be correct. Do you want to use this Identifier anyway?”

  2. Do not use copy/paste for the MAC address. furthermore, use only lowercase (bad: 2C413814CA1A) (good: 2c413814ca1a). This will fix the problem.

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