Enterprise Chat and Email 11.5, cannot log into web page with sa account

[Jeremy McCarthy]

I have a new install of ECE 11.5 in my lab. I was able to get everything installed, but now when I attempt to log into the web page (http://localhost/system/web/view/platform/common/login/root.jsp?partitionid=1) I get the pop-up asking for the username and password. I supply sa for the username and the password created for it, but i get an error stating: Your login information could not be authenticated. Verity your user name and password and try again.

I am able to log into MS SQL Server Management with the same username and password with no issues. I cannot continue with the integration with UCCE until this step is completed, but I am at a loss. Has anyone seen this before and know how to solve it?

[Konstantin Vaksin]

Try to use url http://localhost/system

http://localhost/default is for pa user

[Jeremy McCarthy]

I get the same error when I use http://localhost/system as I do with http://localhost/default. 

[bill.king1]

Are you using a support browser?

https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cust_contact/contact_center/icm_enterprise/ucce_compatibility/matrix/ucce_11_5_x_compat.html#Supported_Browsers_

[Jeremy McCarthy]

Yes, I am getting the login box using IE and being allowed to enter the username and password, it just does not accept it. I can RDP to the server and log into the SQL Manager with that same username and password without any issues.