Hello @mlotfy ,
First of all some or a couple of your old post(s) or reply(s) to them => here <= are still open/pending as you have not marked these as "Accept as a solution" or at least provide some form of feedback or answer.
If they are in this state nobody finding them via a community search will know if an answer or advice provided was useful and has maybe helped you.
Could you therefore kindly go over them and mark or answer as appropriate?
If they are marked as "Accept as a solution" other users can find these easier and it helps them to utilise the community more efficiently. Please do not simply mark them without any type of feedback.
At present we do not know if the Trio is in Microsoft Teams or Microsoft Skype for Business mode as this can affect the ability to downgrade from an unsupported version.
Our normal FAQ contains:
May 11, 2018 Question: Why do I get a "Failed to fetch available software from the Poly hosted server" error message or able to download list but unable to upgrade/downgrade?
Resolution: Please ensure your firewall allows outbound network traffic as shown => here <=
We would need logs and/or a backup to make any suggestions.
Please ensure to provide some feedback if this reply has helped you so other users can profit from your experience.
Best Regards
Steffen Baier
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The title Polycom Employee & Community Manager is a community setting and does not reflect my role. I am just a simple volunteer in the community like everybody else. My official "day" Job is 3rd Level support at Poly but I am unable to provide official support via the community.
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Notice: This community forum is not an official Poly support resource, thus responses from Poly employees, partners, and customers alike are best-effort in attempts to share learned knowledge. If you need immediate and/or official assistance please open a service ticket through your proper support channels.
Please also ensure you always check the VoIP , Video Endpoint , Skype for Business , PSTN or RPM FAQ's
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