Final answer:
The most common issues users have with Exchange are difficulty in setting up and configuring the software, and security concerns.
Step-by-step explanation:
The most common issue users have with Exchange, a popular email and calendar software, is difficulty in setting up and configuring the software. Often, users struggle with properly connecting their email accounts to Exchange, setting up automatic syncing, and managing notifications. Another common issue is related to security, where users may encounter problems with spam emails or unauthorized access to their accounts.
An example of a common issue is when a user tries to set up their email account on Exchange but encounters an 'Authentication Failed' error. This could be due to incorrect login credentials or security settings blocking the connection. In this case, the user should double-check their email and password, and ensure that they have entered the correct server settings.
Overall, the most common issues users face with Exchange are related to setup and configuration, as well as security concerns.