Reason

In some cases you get a second password query if you want to log on the repository. The second  password query looks like the following screenshot.

Reason for this second login are missing permissions on the enterprise server. To remove the second login you have to change the permissions at the CMC.

Solution

First you have to log on the CMC with an admin user. If you are logged in, you open the Data Services section of the CMC

In the Data Services sections you have two options to change the permissions, depending on your requirements.

If you want to remove for every repository, you open the User Security of the repository folder on the left side. Otherwise you open the User Security of the specific repository.

On the new user security window you see the different user groups. Select the user group (in my case it is the Administrators group) and click Assign Security.

The problem is, that the Full Control access level does not have all permission. There for you have open the Advanced tab. In the advanced tab, you click the hyperlink Add/Remove Rights.

In the new window you open the topic Application on the left side and the subtopic Data Services Repository. Now you can the see the specific Data Services rights for Repositorys. To remove the second password query grand the first two right and apply these to object and subobject.

After confirm all windows with OK, the password query is removed.