Outlook mobile app connectivity in same netowrk for Internal Exchange server 2019

Ahmad Nadeem 1 Reputation point

Hi I have deployed exchange server 2019 in my environment. Exchange web app and outlook client for windows is able to login internally without internet requirement. I have also login exchange user on Gmail app and won Windows email client. I am unable to login on android outlook app.
error"the connection to your email server is timed out. Please check your email setting"

Outlook Management
Outlook Management
Outlook: A family of Microsoft email and calendar products.Management: The act or process of organizing, handling, directing or controlling something.
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Exchange Server Management
Exchange Server Management
Exchange Server: A family of Microsoft client/server messaging and collaboration software.Management: The act or process of organizing, handling, directing or controlling something.
7,426 questions
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  1. Kael Yao-MSFT 37,586 Reputation points Microsoft Vendor

    Hi @Ahmad Nadeem

    Did you mean you cannot setup Exchange mailbox on mobile devices in internal network?
    If yes, have you added an A or CNAME record on your internal DNS server to point autodiscover.domain.com to your Exchange server?

    A record: autodiscover.domain.com > <internal ip address of Exchange server>

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  2. Ahmad Nadeem 1 Reputation point

    Hi @Kael Yao-MSFT we have added SRV record
    service: _autodiscover
    port number: 443
    Host: webmail.domain.com
    priority: 0
    Weight: 0

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  3. Ahmad Nadeem 1 Reputation point

    Hi @Kael Yao-MSFT can you please send me a reference document to add A record for exchange internal connectivity for mobile devices?

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  4. Ahmad Nadeem 1 Reputation point

    I have run this command
    nslookup -type=a autodiscover.domain.com
    result screenshot is attached


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  5. Ahmad Nadeem 1 Reputation point

    FYI, I am able to resolve https://webmail.domainl.com.pk/autodiscover/autodiscover.xml

    It will prompt the below screen.