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Office 365 Email FAQ

Following are some frequently asked questions about the email services provided by Office 365.

Office 365 is a subscription service from Microsoft which provides productivity software and related services to its subscribers.  All MSU Denver students & employees are given an Office 365 account when they become enrolled/hired.  The services provided through Office 365 include an online (“cloud”) email service offering 50 GB (gigabytes) of mail storage (quota), use of many of Microsoft's Office line of software products (Outlook, Word, Excel, etc.), and other collaborative features, such as Exchange calendars.

Your Office 365 and NetID accounts use the same password, so you should use the Password Reset Program.

Here are the limits on email within Office 365.  These are set by Microsoft and we cannot change any of them.

  • Quota: 50 gigabytes
  • Maximum number of recipients per message: 500
  • Maximum size of attachment sent/receive: 25 megabytes
  • Maximum number of recipients per day: 10,000

These are very high limits, but in a few rare cases, you may encounter one of them, especially if you frequently send emails to large numbers of recipients.  If you reach 10,000 recipients in a day, your email will be locked for 24 hours by Microsoft and we will not be able to unlock it!

Yes, spam filtering is built in.  Messages the system determines are spam will be delivered to your Junk Mail folder for you to examine; if you tell the system that certain messages are not junk, it will adjust its criteria accordingly.

If you use Outlook, you must be using Outlook 2007 or 2010 (Windows) or Outlook 2011 (Mac).  Older versions will not work.

If you use Mac Mail, versions for Leopard, Snow Leopard, Lion and Yosemite will work.

There are no known incompatibilities with other mail clients (e.g. Thunderbird), but we recommend you only use up-to-date clients.

Please note:  If you set up your account in POP or IMAP, you will not be able to sync contacts or calendars.

Yes.  Instructions for setting up your Office 365 email on an Apple or Android mobile device can be found on our Office 365 main information page.

The login URL for Office 365's webmail access is  Once you are signed in, click on Outlook to open your email account with the Outlook Web App.

According to Microsoft, the full features of the Outlook Web App will be available in the latest versions of Internet Explorer, Firefox, Chrome, and Safari.  The immediately previous versions of Internet Explorer and Firefox are supported as well, but it is Microsoft's general recommendation to use the most recent version of whatever internet browser you use; older versions of a given browser may not have access to all of the Outlook Web App's features, may be forced to use the Outlook Web App Light, or may not work with Office 365 at all.  For more information on Office 365's system requirements, see

The email connection types (Exchange, POP, IMAP, and SMTP) all support SSL encryption to secure your connection, and the web mail client uses https to secure your connection.

For active authentication by Outlook 2007+, Exchange Active Sync (EAS), or POP/IMAP clients, credentials are passed encrypted to Office 365 servers and relayed to the customer’s on-premises ADFS servers secured via SSL. For web-based authentication, user credentials are passed between the client and the customer’s ADFS servers over SSL and never pass to Office 365 at all.

Office 365 provides the ability to encrypt data at rest by supporting technologies that can encrypt the content of emails and/or files. The supported technologies for data encryption at rest include Microsoft’s Information Rights Management (IRM), S/MIME and PGP Email encryption and have the advantage of allowing the customer to maintain full control over the encryption infrastructure and key management on their premises.

Office 365 support for data encryption at rest technologies is designed to minimize the risk of information leakage by encrypting the content, allowing access only by the intended users and by extending the protection beyond the initial publication location. Microsoft’s IRM goes further by restricting the actions allowed on the protected content and also encrypting Office application document attachments.

Office 365 mitigates against the risk of unauthorized physical access with extensive physical protections in their datacenters and operational procedures.

Microsoft has a website listing the services provided to educational users, and we plan to take advantage of these services. However, not all available services will be provided as part of the email migration. Once the email migration has been completed successfully, the other services will be made available as part of a later phase of the project.

Yes, they are supported, and PST file functionality is the same as in older versions of Outlook.

These are terms used in scheduling meetings and do not indicate whether someone is really free or busy.

Further Assistance

If you have additional questions, concerns, or need immediate assistance - Please contact the MSU Denver Help Desk

Revised: March 2015

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