Is it necessary to use XA-Datasource in Appian 7.3? We have Service Corp databas

It does not need to be enabled for Appian. However it has been known to produce warnings in the application server logs.

Tim,
Are there any configuration changes required for non XA datasource?

No there are not.

Thanks for update Tim. Then how will we replace the following line:
<xa-datasource-class>com.microsoft.sqlserver.jdbc.SQLServerXADataSource</xa-datasource-class>

I'm not sure I understand, could you elaborate a bit more? Are you trying to reconfigure your Appian Datasource deployment?

Tim,
I am updating server from 6.6 to 7.3. My datasources are non XA-enabled so I was wondering if I need to do anything different in configuration. As per Appian relational database configuration documentaion for sql server, we need to add the following code in standalone.xml:
<subsystem xmlns="urn:jboss:domain:datasources:1.0">
<datasources>
<drivers>
<driver module="com.microsoft.sqlserver.jdbc" name="com.microsoft.sqlserver.jdbc">
<xa-datasource-class>com.microsoft.sqlserver.jdbc.SQLServerXADataSource</xa-datasource-class>
</driver>
</drivers>
</datasources>
</subsystem>

so I was wondering if the "<xa-datasource-class>com.microsoft.sqlserver.jdbc.SQLServerXADataSource</xa-datasource-class>" is needed to be changed or it can be there without any chages?

Ah thank you for clarifying. No changes are needed to the standard configuration that is outlined in 7.3 documentations. The application server may produce harmless warning messages, but otherwise functionality will remain intact.

Thanks for update Tim. Do we have the option of just configuring as <datasource> type? i.e. non-xa?

Since it has not been extensively tested, I can not recommend changing the type tag.

ok Tim. Thank you.