---
title: "Account setting in Microsoft Exchange Server"
canonical: "https://docs.cuesystem.com/space/MESSG/211746974/Account%20setting%20in%20Microsoft%20Exchange%20Server"
format: markdown
---
It is necessary to set the following accounts in Microsoft Exchange Server:

- Room accounts: There is an email account of MEETING ROOM or RESOURCE kind designated for room scheduling in the Exchange Server. The touchONE system uses the calendar of this account for arranging meetings in the particular room.
- Service account: This is a typical user email account with read-and-write access to the calendars of rooms accounts. The touchONE system uses the service account for accessing the room's calendars. That is because the original rooms accounts cannot administrate themselves.
- The maximum number of rooms managed by one service account is listed in the following table. This restriction arises because, by default, Exchange Server has a limit on the maximum concurrent access to the account at one time, given by the EWSMaxConcurrency parameter.

| Exchange server version | Maximum recommended number of rooms managed using one service account | Default EWSMaxConcurrency value |
| --- | --- | --- |
| 2007, 2010 | 9 | 10 |
| 2013, 2016, 2019 | 25 | 27 |

You can find further information on [https://docs.microsoft.com/en-us/exchange/client-developer/exchange](https://docs.microsoft.com/en-us/exchange/client-developer/exchange)-<u>[web-services/ews-throttling-in-exchange](https://docs.microsoft.com/en-us/exchange/client-developer/exchange-web-services/ews-throttling-in-exchange)</u>. Here the maximum number of simultaneous accesses is set by  
EWSMaxConcurrency parameter. In case you need to manage more rooms, either use more service accounts or change the EWSMaxConcurrency parameter in detailed administrator settings (if allowed by your Exchange Server license).