Just did one today that we uninstalled McAfee and the software wanted a reboot. Customer's IT did not want to do a reboot yet. Long story short scans would not work until the reboot was done to completely remove McAfee files.
Enabling SMB V1 within Windows does fix scan issue's but use with caution because of the Cry Me malware. Sometimes this maybe the only thing to do as after a firmware upgrade SMB V2/V3 may not be enabled or the manufacture just may not support V2/V3 for an older machine.
Email is great until protocols are changed at the email server. Depending on what it is the copier may not support it. Like different ports, SSL/TLS or STARTTLS. Most copiers in the past 3 years, at least, should have no problems with current email servers.
Most customer's IT, in my experience, do not like FTP as they feel it is not secure. It can be made to be secure. I'm just not a fan as it is another piece of software to deal with. It works and I have used it in a pinch.
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