Support

Help when you need it — people and playbooks.

Reach our team for hands-on assistance, or use the self-serve guides below for common remote access, phone, fax, and Microsoft 365 tasks.

Contact Support Outages, account issues, or anything that needs eyes on your environment — reach Cornerstone directly.

For hands-on help, send a note with context and urgency. We’ll follow up without a product pitch.

Tell us what you’re working on — name, topic, and message. Opens your email draft when you submit.

Write hello@askcornerstone.com with screenshots, error text, or timeline constraints.

Self-Guided Help Step-by-step how-tos for remote desktop, PBX, eFax, and Microsoft 365 — browse and complete at your own pace.

Expand a topic to see its guides. Each one walks through a common task from Cornerstone’s support knowledge base.

1 guide Remote Access Secure remote desktop and connection workflows

Step-by-step guide to connecting through Remote Connect, with security tips for remote work.

3 guides PBX Phone system feature codes, voicemail, and call parking

Record greetings, change passwords, and manage basic voicemail features on your PBX.

Quick reference for PBX star codes — allowlist, DND, transfers, parking, and more.

Park a live call in a shared slot and retrieve it from another phone on the system.

2 guides eFax Send faxes by email or through the web portal

Send a fax by email through the virtual fax service — no physical machine required.

Send and manage faxes through the ViewMyFax web portal.

1 guide Exchange Online Microsoft 365 mail setup on mobile devices

Add your Microsoft 365 / Exchange mailbox to Mail on iPhone or iPad.

Still stuck after the guide?

Self-serve covers the common path. When you need judgment or hands on the system — reach the team.

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