I have some mail accounts with exchange connection, the first time that I open outlook I wrote my credentials and checked remember it, in some PCs my credentials don`t save with enterprise persistence and if i close outlook when I reopen it, I have to write my credentials again.

I have already done:

-Uncheckalways prompt from credentials.

-Delete credentials and create it manually with enterprise persistence (Outlook doesn´t recognize it, outlook create new ones).

-Delete the folder C:\\User\myuser\AppData\Roaming\Microsoft\Protect\ S-....

-Import rigth credentials from other PC (Outlook doesn´t recognize it, outlook create new ones).

Somebody know how i can fix it?

So your Outlook client doesn't retain your credential? Have you changed your password recently?

Please try to delete all Office related credentials in the Credential Manager in Windows, and have a try again.

Reference about Outlook keep prompting for password:
https://social.technet.microsoft.com...?forum=outlook