The announcement also creates an opportunity for UC vendors that already maintain interoperability with the Skype for Business desktop client.
Brandenburg said there's nothing preventing these providers from "coming to the aid of their customers" by natively supporting Exchange Online UM through Microsoft APIs.
Organizations unaffected by change are those that connect to Exchange Online UM through Skype for Business on premises or a third-party voicemail with Microsoft's APIs, as well as all forms of on-premises Exchange Server UM.
Brandenburg said the change could be motivated by bandwidth and quality-of-service concerns.
googling that issue, people complained about dell preinstalled apps.
You should try uninstalling the Dell Support software, like My Dell or Support Assist.
Those that have to replace their existing PBXs more rapidly than planned will face accelerated deployment and user training schedules.
Customers planning to deploy third-party services to maintain integration with Exchange Online UM could face software and user-facing issues, as IT will have an additional service to maintain and support, Brandenburg said.
It's likely you uninstalled Dell Data Safe online backup, but not the support program that uses the Dell Data Vault service.
https://gigaom.com/2014/06/12/dells-datasafe-online-backup-bites-the-dust/ I did uninstall dell support, dell agreement, etc.
"I would anticipate quite a few long days for IT admins, as well as more than a few professional services contracts being signed to cope with the changes," said Michael Brandenburg, an analyst at Frost & Sullivan in San Antonio, about Microsoft's decision.