by Jacquie Hartman
on January 11, 2026

The maximum number of recipients for an individual email through USNH IT mail servers is 300. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. Outlook traceroute doesn't work or doesn't provide any useful information either.
How to troubleshoot connectivity issues
You can read how to fix your Outlook problem on the internet, but sometimes the suggestions don’t work for your specific case. So, we have produced this list of general things to try to resolve your problem in Outlook. Read on to find out how to fix common Outlook problems below. This library of articles provides guidance to troubleshoot and fix errors that you may experience when using Classic Outlook for Windows. For a complete list of articles, browse the navigation pane on the left, or use the search box above the pane to filter by keywords and find help with a specific issue.
Issue - Too many recipients in Outlook
Occasionally, classic Outlook tries to run a process in the background. Auto-archive, sending and receiving a very large attachment, or running some of the other mailbox tools can all be done in the background. Check the status bar at the bottom of the screen to see if another process is running.
There are quite a few different causes for this, but one of the most common is a defective add-in.For password issues you must call or visit the Help Desk in person.Similar to our earlier suggestion of repairing Office (see #3 Repair Your Microsoft Office above), perform the same steps except choose to Uninstall.Outlook traceroute doesn't work or doesn't provide any useful information either.J.D. Power 2024 Certified Assisted Technical Program, developed in conjunction with TSIA.
Run The Microsoft Support and Recovery Assistant
Why is my Outlook email suddenly not working?
If Outlook Desktop fails to connect, try these steps before escalating the issue to the ET&S Help Desk. A lot of times, a user will click on something by accident and change their view and be unsure of how to get it back. This option could be useful if you constantly have to wait for Outlook to rebuild its data file when you restart. If you have Outlook in your startup folder, remove the shortcut from the startup folder.

Additional resources

Below, you will see some of the most common issues that users run into, and what the most efficient way to troubleshoot Outlook is. You might need to set Windows Update to automatically download and install recommended updates. Installing any important, recommended, and optional updates can often correct problems by replacing out-of-date files and fixing vulnerabilities. To install the latest Windows and Office updates, click the link below.
Stop Performing a Send/Receive When Exiting Outlook
If Outlook shows Disconnected at the bottom of the status bar, this issue may occur
Email sync repair for Outlook 365 due to improper Autodiscover resolution. Run Test E-mail AutoConfiguration to confirm Autodiscover is resolving to Intermedia servers which helps Outlook to connect properly. Visit the Technology Help Desk Support page to locate your local campus contact information or to submit an online technology support request. For password issues you must call or visit the Help Desk in person.