If you are continually prompted for your credentials before you get into a SharePoint site, then either your username or password or the combination of the two are not correct. One of the solutions below should help you address this problem.
Solution 1 - Make sure that you are entering the correct username. You should be entering the username you use for DrexelOne (typically your initials followed by 2 or more digits) followed by "@drexel.edu". So, if your username is abc99, you would enter firstname.lastname@example.org.
Solution 2 - If you are entering your correct username in the proper format and still not able to sign in, then the password you're entering must not match your Drexel Domain password. To check, go to https://accounts.drexel.edu, enter your username and the password you believe to be correct, then select "Drexel Domain" in the "On what system is that account?" field. If you are able to sign in to the Accounts page, then the password you entered is, in fact, your Drexel Domain password. If not, you can contact the Accounts team at 215-895-2020 for assistance in resetting your Domain password.
In this situation, SharePoint is recognizing who you are, so the username and password you've entered is correct, but it's telling you that you do not have permission to access that specific site or page. Our SharePoint Home site (https://moss.drexel.edu) is accessible to everyone with current and valid Drexel Domain accounts (that is, all Faculty, Staff and Students). However, other sites within the environment have different permissions which are often managed by the "Owners" of that site.
If you are trying to access a site from a link that was emailed to you or one that is posted on a department's website, contact the sender of the email or the department on whose site the link appears. If you're unable to determine who to contact, you can email email@example.com. Be sure to include the address of the site you're trying to get into and any other relevant information (such as why you are trying to access the site).
This occurs when you cross from one "security zone" (typically a site or site collection) to another, or when using a different application (for example, Microsoft Word) to access a file stored in a SharePoint site. Depending on your circumstances, there may not be much you can do eliminate this issue.
I you have a Windows computer that is joined to the Drexel Domain (that is, you sign in to the computer with your Drexel username and password), then you can configure it to automatically authenticate to SharePoint or SharePoint-based resources. See the Auto Login Instructions for more details.
If you have a Windows computer that is not joined to the Drexel Domain, or any non-Windows computer, your options are somewhat limited. If you have a Mac and use Microsoft Office 2011, you can save files directly to SharePoint Document Libraries by following these instructions. If you typically interact with just a few Document Libraries, you can use those instructions to save a connection to each of them. Another option (again, specifically for Document Libraries) would be using Microsoft Document Connection.