Friday, September 9, 2022

"Failed creating application activity" error when you use the Test-CsUcwaConference cmdlet in Skype for Business Server 2019 and 2015 [MS]

Symptoms

In a Microsoft Skype for Business Server 2019 or 2015 environment, you run the Test-CsUcwaConference cmdlet to verify that a pair of users can schedule, join, and then conduct an online conference by using the Unified Communications Web API (UCWA). In this scenario, the test fails, and the outputs return a "Failed creating application activity" error message. For example:

$cred1 = Get-Credential "CONTOSO\User1"
$cred2 = Get-Credential "CONTOSO\User2"
Test-CsUcwaConference -OrganizerSipAddress sip:User1@contoso.com -OrganizerCredential $cred1 -ParticipantSipAddress sip:User2@contoso.com -ParticipantCredential $cred2 -TargetFqdn pool.contoso.com
Target Fqdn: pool.contoso.com
Target Uri:
Result: Failure
Latency: 00:00:01.3141048
Error Message : Failed creating application activity.
Inner Exception:One or more errors occurred.
Inner Exception:One or more errors occurred.
Inner Exception:Object reference not set to an instance of an object.

The commands that are shown here test the ability of a pair of users (CONTOSO\User1 and CONTOSO\User2) to participate in a UCWA online conference.

Resolution

To fix this issue, install the following updates, as appropriate for your version of the program:

For Skype for Business Server 2019

December 2021 cumulative update 7.0.2046.385 for Skype for Business Server 2019, Core Components

December 2021 cumulative update 7.0.2046.385 for Skype for Business Server 2019, Mediation Server

For Skype for Business Server 2015

January 2019 cumulative update 6.0.9319.537 for Skype for Business Server 2015, Front End Server and Edge Server

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