AD Users not able to authenticate

AD Users not able to authenticate

Dear,

I am using a Standard version on ManageEngine Service Desk (for testing) and when I asked my enterprise users to login using their user credentials (AD authentication added), it is working for some users but it is giving invalid user name and password for few users.

When I reset their password from SDP, its working for them but AD authentication is not working for some old users. I have checked that the Domain name is same for all and in CAPS, but still I have issue with some of the users with authentication.

Because of this issue, I had to move back my ticketing system to old software which we were using earlier.

What could be the possible issue? Appreciate any responses and suggestions.

Thank you,

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