On May 13, 2016 the Response Act of 2016 was proposed that would require the FCC to adopt rules within 18 months to ensure that call location information is conveyed with Multi-Line Telephone System 911 calls.
Proposed regulations for multi-line telephone systems (MLTS) to be implemented with Enhanced 911 (E911), which includes automatic location identification (ALI) and automatic number identification (ANI), which provides at least the building and floor location of the caller.
To setup send as and send on behalf permissions in the EAC of Exchange 2013 and Exchange 2016 log in to the EAC and navigate to Recipients Mailboxes then select the mailbox you would like to grant user permissions to send as or send on behalf. Then select which option you would like, either send as or send on behalf , click the plus sign and add the user who you would like to grant permissions to.
During the deployment of a cumulative update within a site that contains load-balanced Client Access server or Database Availability Group members there will be a period where servers are not at exactly the same version.
Although this is expected and supported, it is not supported to stay in that state for a long period of time.
Once done we then need to setup the send from option in outlook.
You can setup send as in Exchange 2013 and Exchange 2016 two ways, either send as or send on behalf.