our prod env use PVA in teams version and follow the doc:https://learn.microsoft.com/en-us/power-virtual-agents/advanced-proactive-message#send-proactive-message-to-multiple-recipients-in-parallel to create PA flow to send "Emergency Maintenance notice from IT divisions" to 966 recipients from an AAD security group, but got lot of error at action Post message in a chat or channel"
{"statusCode":403,"headers":{"Retry-After":"1185","Access-Control-Allow-Methods":"GET, PUT, PATCH, DELETE, POST","Access-Control-Allow-Origin":"*","Access-Control-Max-Age":"3600","Access-Control-Expose-Headers":"*","Date":"Mon, 17 Apr 2023 09:40:15 GMT","Content-Length":"100","Content-Type":"application/json"},"body":{"statusCode":403,"message":"Out of call volume quota. Quota will be replenished in 00:19:45."}}
"
I Summarize the result to sharepoint lists , It's close to half error:
my PA flow :
apply to each settings:
I find the teams connector Throttling Limits 100 calls in 60 sec
https://learn.microsoft.com/en-us/connectors/teams/#limits