Configuration recommendations

After publishing Exchange through the Forefront Unified Access Gateway (UAG) portal, you should make sure that it is sized correctly for your intended deployment.

The following tables provide the recommended settings that you should apply for Outlook Web Access (OWA) or Outlook Anywhere.

Configuration recommendations for OWA (without Outlook Anywhere)

Parameter and location	Description	Default value	Recommended value	Maximum value
Maximum connections In the Forefront UAG Management console, next to Configure trunk settings, click Configure.	Configures the maximum number of connections to the Forefront UAG.	100,000	4*N where N is the estimated number of concurrent users.	1,000,000
Maximum concurrent sessions In the Forefront UAG Management console, next to Configure trunk settings, click Configure, and then on the Advanced Trunk Configuration dialog box, click the Session tab.	Configures the maximum number of concurrent sessions to the Forefront UAG.	100,000	4*N where N is the estimated number of concurrent users.	1,000,000

Parameter and location

Description

Default value

Recommended value

Maximum value

Maximum connections

In the Forefront UAG Management console, next to Configure trunk settings, click Configure.

Configures the maximum number of connections to the Forefront UAG.

100,000

4*N

where N is the estimated number of concurrent users.

1,000,000

Maximum concurrent sessions

In the Forefront UAG Management console, next to Configure trunk settings, click Configure, and then on the Advanced Trunk Configuration dialog box, click the Session tab.

Configures the maximum number of concurrent sessions to the Forefront UAG.

100,000

4*N

where N is the estimated number of concurrent users.

1,000,000

Configuration recommendations for Outlook Anywhere

Parameter and location	Description	Default value	Recommended value	Maximum value
Maximum connections In the Forefront UAG Management console, next to Configure trunk settings, click Configure.	Configures the maximum number of connections to the Forefront UAG.	100,000	30*N where N is the estimated number of concurrent users.	1,000,000
Maximum concurrent sessions In the Forefront UAG Management console, next to Configure trunk settings, click Configure, and then on the Advanced Trunk Configuration dialog box, click the Session tab.	Configures the maximum number of concurrent sessions to the Forefront UAG.	100,000	30*N where N is the estimated number of concurrent users.	1,000,000
HKLM\SOFTWARE\WhaleCom\e-Gap\Von\UrlFilter\Comm\SSL\MaxSSLBuffers	Configures the maximum number of encrypted (TLS) buffers received from the back end server.	100,000	30*N where N is the estimated number of concurrent users.
HKLM\SOFTWARE\WhaleCom\e-Gap\Von\UrlFilter\ConcurrentRequestsLimit	Configures the IIS to accept the required number of connections.	200,000	30*N + 50000 where N is the estimated number of concurrent users.