Here are the general Veeam support renewal guidelines:
Co-terming consolidates multiple purchases or contracts into one expiration date, simplifying the renewals process for all parties and securing support for the customer. Veeam offers per-socket annual and monthly maintenance renewal SKUs, as well as VUL annual and monthly product renewal SKUs. Monthly SKUs are only to be used to help consolidate and align contracts to expire in the same month.
To co-term (or consolidate) per-socket contracts, the number of months required should be multiplied by how many sockets are on the contract being consolidated. For VUL contracts, the number of months required should be multiplied for every 10 VUL licenses on the contract being consolidated.