2016年4月11日 星期一

How to solve the slow Wi-Fi problem 如何解決 Wi-Fi 慢的問題

時下購買 Wi-Fi Router 請購買有 5Ghz Wireless Router, 只有2.4Ghz的Wireless Router其實很不在很不適合香港地方使用。

5Ghz Wi-Fi 信號的最大好處,速度比2.4Ghz快,但穿透力極差所以會怕坐房的同事接收唔到
2.4GHz Wi-Fi 信號的最大好處係穿透力高,但速度比5Ghz慢,但致命點係受干擾

當你使用手機搜尋無線時你會發現很多無線Router,基本上所有2.4Ghz 頻道內的頻譜很小,當Wi-Fi router接收到信號只會回應正確密碼的設備,不正確密碼的需不作回應但接收到信號時已使用了其頻寬,你不能想像佢絕大部份都唔係幫你做緊野,係不停咁收到信號又要reject, 所以會出現慢的情況,當你覺得隻Wi-Fi慢時,往往會考慮換隻接收勁D既Wi-Fi, 結果係你受干擾既距離更加大,死既人就越來越多,下圖係我屋企既Wi-Fi 2.4GHz (MYS)及5Ghz (MYS 5Ghz), 你可以睇到 2.4Ghz 得13條Channel, MYS係Channel 1但係其實cover到去Channel 3底層既Wi-Fi互相重疊到連名都睇唔到!  我係屋企用2.4Ghz Wi-Fi 基本上係慢到用唔到,有時download ok 50MB, upload 得0.1MB,而5Ghz Channel 基本上因為穿透力低根本收唔到隔離屋既信號所以速度及穏定性都很高!


早前購買左Apple Airport Extreme, 可以單一SSID同時接收2.4Ghz及5Ghz頻道,使用了一個多月,實在很不理常,行雙頻道本來係好好既設計,但有時係真係唔知你們的手機會接左去2.4Ghz定5Ghz, 假如去左2.4Ghz可能就會很慢, 因為係受干擾速度慢,而唔係接收唔到,所以佢唔會調返去5Ghz,因為無法控制所以我建議拆返開兩個SSID用一定會比單SSID雙頻好!

AirPort Utility > Wireless > Wireless Options > Enable 5Ghz 就可以分開不同SSID不同頻道,咁唔一定個個人都要咁做,好似上圖咁你唔拆開一定唔掂,但如果你住半山密度低基本上都唔洗點怕受太多干擾就梗係單SSID雙Channel啦。

2016年4月6日 星期三

Office 365 Exchange Online Setting

Office 365 Exchange Online Setting

Distribution Group E-Mail
 - coming

Grand permission to Staff A open Staff B mailbox
 - coming


Configure Exchange Mode for Outlook 2013/2016
Please refer the official link, watch a video
https://support.office.com/en-us/article/Set-up-email-in-Outlook-6e27792a-9267-4aa4-8bb6-c84ef146101b?ui=en-US&rs=en-US&ad=US



POP3, IMAP and SMTP setting
When you change E-mail services to Office365, remember you have a lot of equipment/application may not sent e-mail anymore because you need to update the smtp server name, port and username/password.




Will using SMTP equipment/application
e.g. Copier Scan to E-Mail, Server iLO/iMM/iDrac, Server/NAS/Hardware/Software application warning/error notification e-mail.


If you’re connecting to your Office 365 for business email, you don’t need to look up your settings. For Office 365 for business, use the following settings.

* Some clients refer to implicit TLS as SSL.

source from https://support.office.com/en-us/article/Outlook-settings-for-POP-and-IMAP-access-for-Office-365-for-business-or-Microsoft-Exchange-accounts-7fc677eb-2491-4cbc-8153-8e7113525f6c?ui=en-US&rs=en-US&ad=US

This is sample such as configure Office 365 Pop3/SMTP mode on Thunderbird or Non-support Exchange Mode mail client.





































The following problem is i tried before.


Trial / Start Office 365 Exchange Online
Problem :
Always hang on, we're not quite ready when you access the mailbox

First time register the trial Office 365 for your domain, you should using xxxxxx.onmicrosoft.com to setup a mailbox first, once everything is done and you can access the mailbox on web, then you can set your domain as default and create another user account.
I tried if i quick start a trial and setup my company domain as default and i never try access the mailbox on web, Office 365 may be can't create a mailbox for your domain, so should using onmicrosoft.com first.

Always show we are preparing a mailbox for this user













Solution :
Try change xxxxx.onmicrosoft.com is your default domain, access the mailbox then change back your company domain to default.


Mailbox Database and delete the old mail.
Current each mailbox basic is 50GB mailbox, when you delete the mail and empty the deleted item folders, you can free up more space on your mailbox, but all of your deleted item you can recovery on 30 days, that mean even you empty the deleted item, you also can recovery with-in 30day, actually on background each user have 50GB storage for store deleted item.  So what's the problem?  If background 50GB storage for recovery deleted item is full and no space, all delete the e-mail and empty the folder it will show up again, just like can't delete the mail, this is cause by user delete e-mail over 50GB with-in 30 days, the only way is call Microsoft for temporary increase the background storage or wait few day for reduce the background storage.

Problem :
E-mail come up after delete.

Cause :
User delete e-mail over 50GB with-in 30 days

Solution :
call Microsoft for temporary increase the background storage or wait few day for reduce the background storage.