I am integrating 3CX with Zoho DESk but is not working correctly. When the number in Zoho Desk starts with + it will not recognize and will not pull the info. Any ideas on how to resolve?
You should store the numbers in the CRM always in the same format (for example always with the plus, then country code, then local number). Then you can reformat the caller ID when you receive inbound calls to match what the CRM expects, please check this: https://www.3cx.com/docs/cid-reformatting/