So I work in information security and I'll tell you i haven't seen good standards around this. In some places IT people regularly look at emails or web traffic, which i think is wrong.
When I go into a company I make sure we put a policy in place that to review an employees emails / web traffic / devices we need to have Legal and HR sign off on it unless the person being investigated is part of one of those groups then it is one group and an executive.
This covers me from legal/HR fallout and it covers the employees because they know we aren't just sneaking around looking at their stuff, it creates trust.
When I go into a company I make sure we put a policy in place that to review an employees emails / web traffic / devices we need to have Legal and HR sign off on it unless the person being investigated is part of one of those groups then it is one group and an executive.
This covers me from legal/HR fallout and it covers the employees because they know we aren't just sneaking around looking at their stuff, it creates trust.