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7.2. Using Mobile ZAC on iPhone

Last updated: Fri Jul 2026 03:16 PM (EDT)

CRL Technologies • IT Knowledge Base

Using Mobile ZAC on iPhone

Zultys Mobile ZAC (iOS) • Your CRL work number on your phone
Applies to: CRL staff using a CRL work number on iPhone  |  Category: Phone & Voicemail  |  Last updated: 2026-07-17

Mobile ZAC is the Zultys app that puts your CRL work number on your iPhone — place and receive work calls, check voicemail, chat, and join conferences, all while keeping your personal number private.

Mobile ZAC replaces the older apps. If you have the old green Zultys Mobile Communicator or the MX Mobile app installed, uninstall it — both are being retired and MX Mobile is no longer supported. Install Mobile ZAC and sign in as shown below.

Step 1 — Install Mobile ZAC

  1. Open the App Store on your iPhone and search for Mobile ZAC (published by Zultys), or use this link: Mobile ZAC on the App Store.
  2. Download and install it like any other app.

Step 2 — Sign in

  1. Open Mobile ZAC. When prompted to send notifications, tap Allow — this is required for call, message, and voicemail alerts.
  2. Enter your sign-in details:
    • Login / Username: your CRL username, all lowercase
    • Password: your ZAC/voice password (provided by IT)
    • Host / Server: mxe.crltechnologies.com
  3. Tap Login.

Two things to get right: your username must be all lowercase, and the server (FQDN) is mxe.crltechnologies.com. Most sign-in problems come down to one of these two.

Step 3 — What you can do

Mobile ZAC has feature parity with the desktop app. From your iPhone you can:

  • Make and take work calls over Wi-Fi/data or your mobile carrier network — your CRL number shows as the caller ID, and your personal number stays private.
  • Move a call between devices — push or pull an active call between your iPhone, desk phone, and PC softphone without the caller noticing.
  • Check voicemail with the visual voicemail list (voicemails also arrive in your CRL email).
  • Message and chat — instant messages, SMS/MMS, file and image sharing.
  • Use the company directory with presence and notes.
  • Start or join conferences, including ad-hoc and scheduled calls, plus call controls like hold, park, and transfer.

Need help?

If you need help installing the app, resetting your ZAC/voice password, or you hit an error, open a HelpSpot ticket with the IT Team.

Zultys also has a short walkthrough: Mobile ZAC video tutorials.

© CRL Technologies, Inc. — Internal IT Knowledge Base. For CRL staff use only.

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