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Thanks Phong. "Yes", I mean across different companies that use both RingCentral and our software. We plan on storing all session events in the db as they arrive. Don't want to later retrieve a group of event records that share the same sessionId, but belong to multiple companies. If that's a possibility we'll have to key off of both sessionId and companyId (or accountId as you mention). We'll always store the accountId, but don't want to key off it if we don't have to.

Saying "across all RingCentral accounts" do you really mean different companies? Many developers called accounts but they just meant extensions so I need to confirm. Anyway, I believe that the telephony session id is unique.

If you meant different companies, you should first identify the account id, then the telephony session id, this way you can identify which company to operate on.