so for example

product #1 queue all emails back and forth are sent by product1@company.com 

product #2 queue all emails back and forth are sent by product2@company.com 

We want to  use otrs with Microsoft Exchange and in the Admin section under The Framework:Core:Sendmail we had the exchange settings and the AuthUser and Password which works. 

For the Exchange AuthUser and Password I use the SMTP exchange credentials for product1@company.com

Problem is when someone  uses product2@company.com to respond to users opening tickets in queue 2 they cant we are getting the error

Can't use from 'product1@company.com' : 5505.7.1 Client does not have permissions to send as this sender

i guess that basically means we cant use product1@company.com to respond to a queue product2 that has a system address of product2.  Does that make sense to everyone.  And is there a easy way around this. 

I do not think creating a generic ms exchange account that is just used for exchange authentication would help or am I wrong.