Add Outlook credentials to windows credentials manager for each user via Group policy/ registry edit/ logon script?

Hello Experts: In my environment, I have Exchange on-prem 2013 CU18, AD 2012R2, Outlook 2016, and Outlook 2013. I believe by default Outlook saves credentials into Windows credentials manager??, however, it does not seem to be doing this. I would like to add Outlook credentials for each users to their local credentials manager. Is this achievable through a group policy or registry change?

I require this as we are about to start O365 migrations. I've noticed, if i save Outlook credentials into credentials manager prior to migration/ cut-over, then when a users mailbox is cut-over to O365, it does not prompt for credentials when closing and re-opening Outlook the first time. We have modern authentication enabled in our tenant with Pass-through authentication. it is normal behavior for Outlook to ask for creds the first time it is opened after cutover, but each user that has delegated permissions to the migrated mailbox, also gets prompted for credentials. I would like to make this experience for the user as friendly as possible. Please let me know and thanks in advance.
Newguy 123Asked:
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systechadminConsultantCommented:
well there is no native GPO to meet your requirement, but you can use and customize the powershell script on Technet Gallery and can use as logon script.

Refer if that helps your requirement

https://gallery.technet.microsoft.com/scriptcenter/PowerShell-Credentials-d44c3cde
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Shaun VermaakTechnical Specialist IVCommented:
Just be aware that if you deploy that as a script, everybody will be able to see passwords
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