What does DNS propagation mean?
When there is changes to the DNS records, it takes time for the changes to be reflected globally. This process is called "DNS Propagation".
How long does the DNS takes to refresh?
The cache will be refresh accordingly to it's TTL (Time To Live) value. Once the TTL has expired, it will fetch the latest records from the DNS server
Can you speed up the DNS propagation as my services are affected now?
Sadly, the answer is nope. DNS server refresh records accordingly to the TTL thus you have to wait for the DNS to be fully propagated