Your @medschl or @SLCU email account is part of what is called your "Exchange" account, and contains your email, calendar, contacts and tasks. @Cam addresses are usually on a different system and just provide email. There are multiple ways of accessing these accounts, which is best depends on your working habits:
Child pages (Children Display)
Some further information on our Email system can be found in our Email Guidelines section.
Child pages (Children Display)
Via webmail - https://outlook.office.com/
Set up Outlook on your computer/device - Setting up Exchange Online