Dear RM Rojas
Welcome to Microsoft community.
According to your description, you need to use PST and want to configure your Gmail account.
Currently, New Outlook does not support opening PST files. For PST files, you need to use Classic Outlook.
When you configure your Gmail account in Classic Outlook, what mail protocol do you use and what specific problems do you encounter? Through testing, I can configure Gmail's IMAP protocol in the following way. You can try it as follows. However, it should be noted that the imap protocol uses the ost file by default. If you have other requirements for the account protocol, please explain further.
- Gmail requires a special application password to configure the IMAP protocol, not the account password. If you still remember the password of the last application you can use it, if you have forgotten it you will have to reapply it by accessing your browser itself. The prerequisite for the application password is to enable two-step verification of the account.
Sign in with app passwords - Google Account Help
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- If your Gmail account has not been opened through IMAP permission, you need to find "Forwarding & POP/IMAP" in Google mail settings, check the status of IMAP downloads, whether it is allowed to use it or not, and choose Allow all emails or others according to your situation.
- Open Classic Outlook and add your Gmail account, select "Let me manually set up my account" under "Advanced options", click Continue. Enter your "Password" and click Connect.
5. Due to the recent release of a new type of authentication by Google, you need to change the default IMAP domain address, if it is not changed, you may encounter error, please click "Edit Account Settings" to change it.
- The required changes are set out below:
1) IMAP server address: imap.googlemail.com SMTP port encryption type and port number: SSL/TLS / 993
- SMTP server address: smtp.googlemail.com SMTP port encryption type and port number: STARTTLS / 587
I hope this information has been helpful to you. If you have any questions, please let me know and I will be happy to help.
Sincere greetings
Forry.F - MSFT | Microsoft Community Support Specialist