Microsoft Exchange will only allow a certain number of concurrent connections over EWS (Exchange Web Services) to a single account. If that limit is exceeded, new connections are denied until some of the existing connections have been closed.
For best performance, we strongly recommend not exceeding the admin account to room account ratio in the table below.
Important! If these values is exceeded, your Room Managers are likely to experience intermittent disconnection issues, the more the limit is exceeded the more frequent you should expect these disconnection issues.
| Booking system | EWSMaxConcurrency | Room accounts per Room admin account |
|---|---|---|
| Office 365 | 27 | 26 |
| Exchange 2016 | 10 | 9 |
| Exchange 2013 | 27 | 26 |
| Exchange 2010 | 10 | 9 |
| Exchange 2007 | 19 |
Note! These are default values. The maximum number of concurrent connections (EWSMaxConcurrency) can be changed for Exchange 2010, 2013 and 2016, but not for Exchange Online/Office365.
For more information on EWS throttling in Exchange, please see EWS throttling in Exchange on Microsoft Office Dev Center.
For information on how to add more room administrator accounts to Evoko Control Panel and assign rooms to each admin account, please see the Setup Guide for your booking system.