Hello @TUSHAR_DIWASE ,
i had a bit similar issue. When i read emails from outlook and try to access any of their properties the bot used to throw an error. so i had to close the outlook and read it again.
I found that this problem is occurring because the bot is not able to access the email properties, so to resolve this issue i have used the below solution.
So the solution i found is first we need to read all the emails and while reading it uncheck the “mark as read” box. After reading the emails just try to access any of it property for an example try to access it subject “string.isnullorEmpty(mail.subject.tostring)”. Put the above condition in a if loop and if it is able to access then use another read outlook mail activity and this time mark the unread emails as read(check the “mark as read” property) and then proceed to your main code. else kill the outlook and relaunch it and this time simply repeat the process until u could access the properties of the email.
I hope this solution might help you a bit.