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AVEVA™ InTouch HMI

License behavior for Web Client sessions

  • Last UpdatedJul 03, 2026
  • 4 minute read

The Web Client acquires its own license and this license is different from the desktop application license. It uses a session-based licensing model. A Web Client session is defined per user per machine. The number of users or connections allowed at one time depends on the total sessions permitted by the installed licenses.

You can install multiple licenses on the same node, and their session counts are cumulative. For example, if you install two licenses that allow 50 sessions each, the system permits up to 100 concurrent sessions in total. However, if an Unlimited session license is installed on the same node as one or more limited (counted) session licenses, the Unlimited license takes priority. In this case, the system allows unlimited sessions, and the limits defined by the counted licenses will no longer apply.

License

  • Feature Name: webserver

  • License Type: Server license

  • Parameter: clientcount

    Here,

    • If clientcount is any other non-negative number, that number represents the maximum allowed session.

Deprecated licenses

The following InTouch license will no longer work in 2026 release or later:

  • Enterprise: spe-i-enterprise

  • Workspace license: it-i-webserverflex

  • Previous unlimited R/W: it-i-webclientunlimrw

  • Previous unlimited R/O: it-i-webclientunlimro

  • Brand neutral license: avhmi-i-ocws

License comparison by release

InTouch Web Client license behavior changes:

2026 or later

2023 to before 2026

Before 2023

Enterprise license 

No 

Yes 

No 

Webserver Flex license 

No 

Yes 

No 

Unlimited R/W license 

No 

Yes 

Yes 

Unlimited R/O

license 

No 

Yes 

Yes 

Connection license 

Yes + unlimited 

Yes 

No 

Single session mode 

R/W 

R/O 

R/O 

Grace period 

Yes 

Yes 

Yes 

Demo mode 

No 

No 

No 

Single session mode

If a valid license cannot be obtained and the web server is not running in Operations Control connected experience mode, only one read/write (R/W) licensed session is permitted. In this situation, one free client session is provided with full read/write capability and no time restriction. However, if a supervisory client license is not available on the web server node, the read/write connection to the Galaxy attribute is restricted to a 2-hour demo mode of the data service. There is no demo mode for Web Client. If no license is acquired, then it will switch to single session mode.

Web Client connection

When you open the InTouch application in a web browser, it is treated as a Web Client connection.

The system checks whether the user belongs to either the Read/Write (R/W) group or the Read-Only (R/O) group. If the user does not belong to either group, an error page is displayed. If the role check passes, the session continues.

If Operations Control connected experience is configured on the browser machine:

  • For InTouch web:

    • If the underlying application is an InTouch View, the system tries to obtain a Supervisory entitlement.

    • Otherwise, it tries to obtain an Edge entitlement.

If Operations Control connected experience is not configured on the browser machine:

  • The system checks whether a licensed session is available.

  • If a session is available, it is granted based on the user’s role (R/W or R/O).

  • If no session is available, a license error page is displayed.

Behavior in Operations Control connected experience

In Operations Control connected experience mode, if the user has a valid entitlement, a perpetual license is not required. The web server will rely on the client to perform the license check. In this case, the Galaxy data service license requirement is bypassed.

License renewal

If a license has been successfully acquired, the web server will try to renew the same license automatically. The license is renewed once every day.

If the same license cannot be renewed:

  • A grace period timer will start.

  • Existing licensed sessions will continue to work as before.

  • New client sessions can still be granted, as long as licensed sessions are available.

If the license is successfully renewed:

  • The grace period timer (if running) will stop.

  • Everything continues to operate normally.

Note: License renewal does not apply when running in single session mode.

Grace period

The web server will go into a grace period if a valid license was acquired at startup but fails to renew. The grace period is 14 days. While in Grace Period:

  • Web Server shall maintain the current licensed session count

  • Existing client session continue to have same access and capability (R/W or R/O)

  • New client session will be granted the same way as usual up to the current licensed session count.

If the grace period has ended without reacquiring the license, then:

  • Web server will immediately set licensed session count to 1.

  • Web Client will only see this change of license status until there is a request from the web client to the web server.

For example: The Web Client session is in grace period mode and grace period has expired. If you do not refresh the Web Client page, the new license status will not be updated in the Web Client page.

Release of license

When the web server shuts down, it releases any license it has acquired, regardless of how many client sessions are active or the current license state. All active Web Client sessions are terminated immediately. After the web server is restarted, any previously connected clients must re-establish their sessions. This process should happen automatically, and the web server does not need to perform any special action other than responding to client requests as usual.

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