I think the definitive answer to the headline question will be in data protection legislation rather than the Withdrawal Agreement.
The provisions of 2016/679 (with some listed exemptions and revisions) have been incorporated in the Data Protection Act 2018. I've seen no indication that changes to this Act are being considered during (or after) the ...
Your email: no. But this is the University’s email
You say they use Microsoft Office 365. When you signed up, you signed up to the ToS which are clear that this is a corporate email account that belongs to the University.
Are they allowed to Access/View/Edit out accounts?
Is this legal?
Do I have any say in it? As in, can I ...
If this was not disclosed clearly to any form of "Terms & Conditions"
that I agree to by studying here...
It was absolutely disclosed; read the contract(s) you (or your parents signed, depending on your age) for admission and to enroll and to take classes. You signed and agreed to the IT usage policies, which will include an email account and any ...
Under 45 CFR 164.502,
A covered entity or business associate may not use or disclose
protected health information, except as permitted or required by this
subpart or by subpart C of part 160 of this subchapter
PHI is defined in 45 CFR 160.103:
Protected health information means individually identifiable health
information: (1) Except as ...
[site] does not rent or sell your personally identifiable information
to third parties.
[site] does not share your contact information with
other users or third parties without your consent.
Look, they do not rent or sell your PII, but what is it that they do not share? Not PII but contact information.
Is contact information PII? Sure. Is PII ...
Under the new California CCPA that came into effect January 1, 2020 you must delete a customer's data on request. If you have customers in a jurisdiction that has such rules, you must comply with those rules. This is why we all have to agree to cookies now, it's a European GDPR rule.
California can fine you if you don't comply with their legislation, and ...