The latest version it no longer sends SNMP traps to Spectrum for alerting.
This link shows the third party options that are available
https://www.mongodb.com/docs/ops-manager/current/tutorial/third-party-service-integrations/
Currently, Ops Manager webhook only supports HMAC-SHA-1 signature which can be provided in the format of a secret key. Therefore, it is not possible to provide a user/password in Ops Manager webhook.
What options do we have to send alerts to Spectrum?
Spectrum does not support this type of signature authentication. Suggested to use an alternate source that would then forward the message to Spectrum.