it's one of the dangers to BYOD.....The best way to manage this is education(unless you are ready for MDM).
Granted that can be a bigger pain in the buttocks than working around it.
What I tell people(having had this happen to me a couple of times) is when it's time to change your password
1.) Make sure you have all your devices with you
2.) disable the wireless on everything
3.) change password via your laptop
4.) enable one device, and go change the password there < rinse repeat for subsequent devices.
Now, when the company I was working for moved to a MDM, the issue went away on my phone and tablet, as the mail settings were controlled by the MDM, so when i changed my password, it pushed to my other devices.
HTH,
Steve
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Please remember to rate useful posts, and mark questions as answered
HTH,
Steve
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Please remember to rate useful posts, and mark questions as answered