Over it —- I agree with KWP’s comments, but in NSW what your Strata Manager has done is only legal if the functions of the Executive Committee Secretary have been delegated to them in the Strata Management Agency Agreement that they hold with the Owners Corporation.
You need to check that.
Remember also that in NSW that Agreement can only be terminated without the prescribed notice (usually 3 months prior to its expiry date) by the mutual agreement of the parties as resolved by way of a simple majority vote taken at General Meeting of the Owners Corporation, and that votes on that Motion by proxy must include the proxy-givers’ specific instructions as opposed to the usual authority for the proxy-holder to simply vote on all Motions as they see fit.