I'm a tech support agent and I told my employer. They have been very good with working with me, allowing me to make changes to my schedule for Dr's and therapist's appointments. I've had to leave early sometimes when the workload has been very intense because the stress from the clients was causing anxiety attacks. They have held my position twice while I was hospitalized twice, both times for nearly a month and presently, I'm on a month LOA (leave of absence) due to my bipolar rearing it's ugly head. It has been beneficial for me to disclose the information to my employer. Not everyone there knows, only the people who need to know. I do understand, though, why it would be hard in certain situations where it wouldn't be ideal to tell your employer and that everyone's employer is different and may not handle it the same way.