Autodiscover with large numbers of accepted domain

If  you have many domains  and  don't want to waste  money in using  SAN based  certificates  read the  great tutorials  from  Steve GoodMan's  .


Using AutoDiscover with large numbers of accepted domains - Part One
Using AutoDiscover with large numbers of accepted domains - Part Two

Grep funny issue

grep: invalid option -- t


This happens when there is a file in the local directory that has a name that starts with a “-”, for exampe “-t ” 

remove the file with: rm -i ./-t  and then grep will work