getting invalid_grant error

Trying to set up the plugin with the office 365;

At first had it working, but then had to use a different email account;

So I went and reset the plugin, deleted the postman app and client secret I made in azure originally; and made all new ones with the new user account I created.

Everything works until I try to send a test, it says “invalid_grant” and there’s no solution in the log.

Originally, when I set it up, I had to go and give office 365 permission after finishing the initial set up; but after I reset the plugin and did all new credentials and everything, it never gave me that give it permission thing again; and every time I try to redo this, it always says office365 is configured! and doesn’t give me the option… so is this the grant issue?

Extremely frustrating as I’ve been trying to make this plugin work for hours. every user I’m putting into this has full global, exchange, user, and every other role and permission necessary to make this work….

below is the info from the ‘diagnostic test’ if that’s applicable:
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Mailer: postsmtp
HostName: applicheminc.com
cURL Version: 7.58.0
OpenSSL Version: OpenSSL/1.1.1
OS: Linux node.agilecollab.ca 4.15.0-117-generic #118-Ubuntu SMP Fri Sep 4 20:02:41 UTC 2020 x86_64
PHP: Linux 7.4.30 en_US.UTF-8
PHP Dependencies: iconv=Yes, spl_autoload=Yes, openssl=Yes, sockets=Yes, allow_url_fopen=Yes, mcrypt=No, zlib_encode=Yes
WordPress: 6.0.1 en_US UTF-8
WordPress Theme: Ohio
WordPress Plugins: Advanced Custom Fields PRO, Contact Form 7 Extension For Mailchimp, Contact Form 7, Elementor, Envato Market, Smash Balloon Instagram Feed, WPBakery Page Builder, Limit Login Attempts Reloaded, Ohio Extra, Ohio Importer, Ohio Portfolio, Office 365 for Post SMTP Extension, Post SMTP, Slider Revolution, WooCommerce, Yoast SEO, WP Super Cache
WordPress wp_mail Owner: /var/www/vhosts/old.applicheminc.com/applicheminc.com/wp-content/plugins/post-smtp/Postman/PostmanWpMailBinder.php
WordPress wp_mail Filter(s): wp_staticize_emoji_for_email, PostsmtpMailer->get_mail_args
WordPress phpmailer_init Action(s): wpcf7_phpmailer_init
Postman: 2.1.3
Postman Sender Domain (Envelope|Message): applicheminc.com | applicheminc.com
Postman Prevent Message Sender Override (Email|Name): No | No
Postman Active Transport: Office365 API (https://amazonses.com:443)
Postman Active Transport Status (Ready|Connected): Yes | Yes
Postman Deliveries (Success|Fail): 7 | 3

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Please help!