Unable to Login into Microsoft Work Account

Hello James, 
Thank you for contacting AVG Community Support.
We understand that you are unable to login to your Microsoft account. We'll certainly check and help you out.
Web Shield scans data that is transferred when you browse the internet in real-time to prevent malware, such as malicious scripts, from being downloaded and run on your PC.
A false positive is any clean file flagged as malicious. False positives may sometimes occur in any antivirus software because of new virus definitions being added to the application database. AVG file whitelisting is a service provided mainly to software developers to reduce the risk of false positive detections.
If your website is incorrectly flagged as malicious, you can report this using the Report a suspected false positive webform (https://www.avg.com/en-ww/report-false-positive).
Although it is generally not recommended, you can want to exclude certain files, folders, or websites from being scanned by AVG Antivirus. This can speed up your scans and prevent false-positive detections.
Set exceptions only if you know that the files and websites you want to exclude are safe.
Refer the following article to add Microsoft website to exception list:
Excluding certain files or websites from scanning in AVG Antivirus (https://support.avg.com/SupportArticleView?l=en&urlName=avg-antivirus-scan-exclusions&q=exception&supportType=home)
If you are still unable to access the website or URL, please let me know. 
Thank you and keep us updated.

Every time I try and login I get:
Threat Secured aadcdn.msftauth.net because it is a dangerous webpage - No matter how I try to login into my Mircrosoft account

Hello James, 
Thank you for contacting AVG Community Support.
We understand that you are unable to login to your Microsoft account. We'll certainly check and help you out.
Web Shield scans data that is transferred when you browse the internet in real-time to prevent malware, such as malicious scripts, from being downloaded and run on your PC.
A false positive is any clean file flagged as malicious. False positives may sometimes occur in any antivirus software because of new virus definitions being added to the application database. AVG file whitelisting is a service provided mainly to software developers to reduce the risk of false positive detections.
If your website is incorrectly flagged as malicious, you can report this using the Report a suspected false positive webform (https://www.avg.com/en-ww/report-false-positive).
Although it is generally not recommended, you can want to exclude certain files, folders, or websites from being scanned by AVG Antivirus. This can speed up your scans and prevent false-positive detections.
Set exceptions only if you know that the files and websites you want to exclude are safe.
Refer the following article to add Microsoft website to exception list:
Excluding certain files or websites from scanning in AVG Antivirus (https://support.avg.com/SupportArticleView?l=en&urlName=avg-antivirus-scan-exclusions&q=exception&supportType=home)
If you are still unable to access the website or URL, please let me know. 
Thank you and keep us updated.