Exchange 2013 OWA login issue

That's a weird one. Does it happen on other computers or just the one? What about other users? Did you perhaps cache the password in the past? Check credential manager control panel and delete any cached credentials for OWA.

Please make sure your GC healthy.
Ensure no passwords are cached.
Try in browser with private/incongnito mode.

It happens in another computer in the network too, and in the server itself. And no password is cached.
It’s like if I want to access to mailbox, i need to use wrong password atleast once before use the correct one. Even with Administrator account.

Do this, go to active directory and try to reset the password from there and try one account and see what happens?
Now I have a question for you? what type of authentication are you using?

1- domain\username
2- UPN
3- username

If you dont know let me know?

To Hemil Aquino:
Thanks for your reply. I’m using the third type of authentication, using only username.
I’ll try to reset password for all users and let you know the result asap.

And I installed the EX2013 in same server with DC-DNS server. I donot know whether it was the root of the issue or not

If I was you I would use always UPN.
But it doesn't matter anyways, just try to reset one user password first, then test it and see if it worked.
I think I had this issue before, like 2 years ago.

I tried your way but the issue is still there.
When i log into ECP, then its ok but not for the mailbox.
I think I might need to reinstall the system

Did you try creating a new user from exchange and test it? I think you need to check your virtual directory.

I think you have a login authentication problem, because I remember I had your issue long ago.
If I was you I'd give it a try to using UPN that way you can use the email address instead of the username.

Also try this/ use Domain\User and then password and see what happens after.

Cheers,

Well I tried to set OWA’s authentication to basic authentication and it’s okey now. But I still want to use form-based authentication.
I also tried to create new user too, as well as change authentication method to UPN but it stays the same.

Should I separate the EX and DC into 2 different servers?

if you change the method to a UPN you are aware you need to go to active directory and see if you have the exact UPN as well with ECP user management.

For example, you might have domain.local
When in reality you have mydomain.com
In case you only have Domain.local you need to add the real UPN into domain trust option, that way exchnage can see it and you can add it.

You don't have to separate the domains in two diff servers, I mean it  depends on what you are trying to accomplish but I dont see the reason.

Well everything is correct Hamil. It’s just that I always have to use wrong password once before I can login to the mailbox (ofcourse wwith same UPN/username). This’s crazy.

Since the domain controller it's the one who provides authentication, the only think I could tell you it's to restore the server at some point you didn't have the inconvenient. DC and GC and test it.

But don't do it in production, You need to have a lab environment and test it. You need to create the same scenario and do some testing that's how WE administrator works.

Then later you can have your own conclusion.

I will let you know if I remember something.

Ah. I tried to change back to UPN, and it’s okey now.
Thanks you very much Hamil

Did it work changing the UPN ?

I changed the authentication method to basic and then change back to UPN and it’s working fine atlease for now.
Thank you very much.

I knew it, it was something related with the virtual directory, now keep a track of that problem in word and put it on file in your machine.
That way if some shit happen again you wouldn't have to google or something.

Glad it helps.

Cheers,

Yup, I’ll keep it in mind. Thanks for everything